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2019年10月15日 20:11:57 | 作者:69频道 | 来源:新华社
Botos are highly social, and in the breeding season, there is stiff competition for mates.亚马逊江豚是高度社会型动物。在繁殖季节,会有一场激烈的求偶竞赛The males hold court in a unique way.雄江豚会以独特的方式向雌江豚示爱They pick up rocks in their jaws and flaunt them to their attending females.它们用长嘴捡起石块,然后向自己的“心上人”炫耀。Maybe each male is trying to show how strong and dexterous he is这或许是雄江豚展示自己强壮身体和敏捷身手的一种方式and that he therefore is the best father a female could have for her young.以此来明自己将是最好的父亲,雌江豚为了孩子就应该选它Successful displays lead to mating.求爱成功后,它们便开始交配Even for giant rivers like the Amazon,即使像亚马逊河这般巨大的江河the journey to the sea is not always smooth or uninterrupted.流向大海的过程也并非都是平缓连续的Iguagu Falls, on the border of Brazil and Argentina,位于巴西和阿根廷边境的伊瓜苏瀑布is one of the widest waterfalls in the world, 1.5 miles across.是世界上最宽的瀑布之一,宽幅达1.5英里。In flood, 30 million litres of water spill over every second.瀑布每秒的水流量达到3000万立方米。 Article/201706/513064Have you ever noticed something swimming in your field of vision?你是否会注意到自己的视线中有漂浮物?It may look like a tiny worm or a transparent blob, and whenever you try to get a closer look,它看起来像是小虫或者透明液滴,但当你想要更仔细地看它的时候it disappears, only to reappear as soon as you shift your glance.它又消失了转换视线之后它又会出现。But don#39;t go rinsing out your eyes!但你别去冲洗眼睛!What you are seeing is a common phenomenon known as a floater.你看的其实是一种常见现象,飞蚊症。The scientific name for these objects is Muscae volitantes, Latin for ;flying flies,;科学界称之为Muscae volitantes,是拉丁语中飞蚊的意思and true to their name, they can be somewhat annoying.物如其名,它们有时很讨厌。But they#39;re not actually bugs or any kind of external objects at all.但它们不是真正的虫或者身外之物。Rather, they exist inside your eyeball.它们就存在于你的眼球中。Floaters may seem to be alive, since they move and change shape, but they are not alive.因为“飞蚊”会不断地变形,所以人们会觉得它们是有生命的其实不是。Floaters are tiny objects that cast shadows on the retina, the light-sensitive tissue at the back of your eye.“飞蚊”是一种极小的物质,投影于视网膜也就是眼球后部的光敏组织。They might be bits of tissue, red blood cells, or clumps of protein.它们可能是小块组织,红细胞或是蛋白质团。And because they#39;re suspended within the vitreous humor, the gel-like liquid that fills the inside of your eye,由于它们悬浮于玻璃体,也就是眼内的胶状组织“飞蚊”,floaters drift along with your eye movements, and seem to bounce a little when your eye stops.会随眼球而移动,眼球停止转动时它又会少许地弹动。Floaters may be only barely distinguishable most of the time.“飞蚊”大多数时候不易被察觉。They become more visible the closer they are to the retina,当它们靠近视网膜时,它们变得可看见just as holding your hand closer to a table with an overhead light will result in a more sharply defined shadow.这就相当于你把手放在吊灯下更接近桌子时手的阴影会更明显。And floaters are particularly noticeable when you are looking at a uniform bright surface,“飞蚊”也会很明显比如当你盯着发光的表面时,like a blank computer screen, snow, or a clear sky, where the consistency of the background makes them easier to distinguish.像是空白的屏幕雪或是晴空,因为颜色一致的背景会使“飞蚊”更明显。The brighter the light is, the more your pupil contracts.当看到的光越亮瞳孔会收缩的更厉害。This has an effect similar to replacing a large diffuse light fixture with a single overhead light bulb,这就好比把许多散射的光换成一个大的聚光灯which also makes the shadow appear clearer.也会使得阴影更加明显。There is another visual phenomenon that looks similar to floaters but is in fact unrelated.另外也有一种视觉现象与飞蚊症类似但与之无关。If you#39;ve seen tiny dots of light darting about when looking at a bright blue sky,当你仰望蓝天时会看到小光点在快速闪动,you#39;ve experienced what is known as the blue field entoptic phenomenon.这被称之为谢瑞尔氏现象。In some ways, this is the opposite of seeing floaters.这与看到飞蚊相反。Here, you are not seeing shadows but little moving windows letting light through to your retina.此时,你看到的不是阴影,而是一些移动的小开口让光进入视网膜。The windows are actually caused by white blood cells moving through the capillaries along your retina#39;s surface.这些开口是由白细胞造成的白细胞穿梭在视网膜表面的毛细血管。These leukocytes can be so large that they nearly fill a capillary causing a plasma space to open up in front of them.白细胞可以大到填满整个毛细血管,这导致了白细胞身前的空隙。Because the space and the white blood cells are both more transparent to blue light than the red blood cells normally present in capillaries,由于这些空隙和白细胞本身相比于血管中的红细胞更能让蓝光透过我们,we see a moving dot of light wherever this happens, following the paths of your capillaries and moving in time with your pulse.因此看到小光点沿着毛细血管移动也随着脉搏而移动。Under ideal viewing conditions, you might even see what looks like a dark tail following the dot.在理想状况下甚至会看到光点后有条黑尾巴。This is the red blood cells that have bunched up behind the leukocyte.这是白细胞身后堆积的红细胞造成的。Some science museums have an exhibit which consists of a screen of blue light,有些科技馆中会展览出一整屏幕的蓝光allowing you to see these blue sky sprites much more clearly than you normally would.这会让你跟清楚的看到这一现象。While everybody#39;s eyes experience these sort of effects, the number and type vary greatly.因为虽然每个人都会经历这些现象,每个人看到的程度都不同。In the case of floaters, they often go unnoticed, as our brain learns to ignore them.就飞蚊症而言大多数会被我们的大脑所忽视。However, abnormally numerous or large floaters that interfere with vision但是数目异常多或者大到影响视线的飞蚊,may be a sign of a more serious condition, requiring immediate medical treatment.可能意味着你需要紧急医疗救助。But the majority of the time entoptic phenomena, such as floaters and blue sky sprites, are just a gentle reminder that但是多数的眼内现象,比如飞蚊或者谢瑞尔氏现象,只是委婉地提醒我们what we think we see depends just as much on our biology and minds as it does on the external world.自认为看到的东西取决于我们的生理和大脑,就和取决于外部世界一样。 Article/201706/513782First step: remove the dying heart第一步就是要移除坏死的心脏And hook up Washkansky to a life support machine.然后将人工呼吸机连接到华什肯斯基身上It will do the work of the heart.Pump on.它将代替心脏维持人的生命 开启I#39;d never seen a chest like this before.我从来没见过这样的胸腔A human without a heart,kept alive by a machine.没有心脏 还能依靠机器维持生命Something so sacred as the human heart, the organ of our poets,心脏是神圣不可侵犯的 是我们人体的发动机the internal metronome of our bodies.也是人体内在的节拍器The thought that it could be removed and replaced,它可以移除替换 而病人却还可以and the patients still live, unimaginable.维持生命 这是难以想象的Three hours into the operation,手术进行到第三个小时with the patient#39;s blood mechanically pumped through his body,病人的血液从体内 不断流失Barnard must attach the donor heart before it dies.巴纳德必须将捐献的活体心脏在坏死之前植入Barnard jump-starts the new heart.巴纳德迅速开始植入新的心脏Clear the table.Go ahead and shock it. Shock!清理一下手术台 快去电击 电击The heart beats.But it#39;s still powered by a machine.心脏跳动了但仍然靠机器维持It has to beat on its own Or Washkansky will die.它必须要自己跳动否则 华什肯斯基就会死亡 Article/201606/447367Robert had written a remarkable letter.罗伯特写了一封出色的信The Scots would come, he said,Not as an invader but as liberators, for.信中写道 苏格兰人将远道而来 我们不是入侵者 而是解放者 为了Our people and your people, free in times past,尔族人民与吾族人民 曾共享自由share the same national ancestry and common custom.源起一脉 民俗等同The rhetoric was stirring and it found resonance with the native Irish.信中的豪言壮语让人激动 引发了本土爱尔兰人的强烈共鸣For nearly a century and a half,There had been an entrenched English colony in north and eastern Ireland,在大约一个半世纪的时间里 英格兰在爱尔兰北部和东部 建立了根深蒂固的殖民统治often safe only in castles like Carrickfergus,which Edward Bruce now besieged for a year.如卡里弗格斯城堡这样安全的地方 也被爱德华·布鲁斯围攻了一年之久But the timing was unfortunate,For 1315 also saw the worst famine in living memory.但时逢天灾人祸 1315年 有史以来最严重的大饥荒爆发Very soon, Edward Bruce#39;s army became indistinguishable from any other disorderly gang of knights.很快 爱德华·布鲁斯的军队就和 其它横征暴敛的骑士们一样了Using force to extract the provisions they desperately needed for their men and animals.使用武力来夺取民众 为人畜所准备的救命粮食And not choosing to distinguish with any care between Gaelic friends and English foes.他们见人就抢 不管你是盟友盖尔人 还是仇敌英格兰人Famished and desperate,The Scots soldiers took what they needed from the Irish villagers饥饿与绝望 苏格兰士兵从爱尔兰村落掠夺所需物资And finally resorted, so it was said,to digging up fresh graves.And eating the decayed bodies.据说 到最后 他们挖开新下葬的坟墓 食用腐烂的尸体Month by month, the Bruce#39;s war of liberation turned into something remarkably like an occupation.月复一月 布鲁斯的解放战争 沦落得和侵略战争别无二致 /201611/476164

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新英语900句视频版 第16课:览会 文本如下:Hi, Ali. Where are your parents today?嗨, 阿里, 你爸妈今天到哪儿去了?They#39;re eating in the Italian restaurant again.他们又上意大利餐馆去了.I like hot dogs more than spaghetti.我喜欢热甚於意大利面,And ice cream is the most delicious thing in the world.然而冰淇淋又是世界上最美味可口的东西了.It#39;s not fair.那是不公平的.What isn#39;t fair, Ali?什麽不公平, 阿里?They can eat as much spaghetti as they want.他们高兴吃多少面条就能吃多少,But I can#39;t eat as many hot dogs and ice cream sandwiches as I want. Do you have children?但我想吃多少热和冰淇淋三明治却不能. 你有孩子吗?I have two boys and two girls,我有两男两女,but they are all older than you.不过他们都比你大.How old are the boys?男孩有多大?Bill, Jr., the oldest, is seventeen. Jack is sixteen.小比尔最大, 他十七岁, 杰克是十六岁.Do they play baseball?他们打棒球吗?They sure do. Do you play baseball?当然了, 你也打棒球吗?Not yet. But I#39;m going to learn soon. I#39;m almost seven years old.还没. 不过, 我很快会去学的, 我差不多七岁了.Ali! I#39;m sorry, sir. Is my son bothering you again?阿里! 很抱歉, 先生, 我的孩子又来打扰你了吗?Not at all. He#39;s a fine boy.哪里, 他是个乖巧的孩子.Thank you, Mr...谢谢你, 先生...O#39;Neill.奥尼尔.Father, Mr. O#39;Neill#39;s sons play baseball.爸, 奥尼尔先生的孩子都打棒球.That#39;s nice, Ali.阿里, 那很好啊!I want to learn, too.我也要学,But nobody wants to teach me.但是没人教我.You#39;re too young, Ali.阿里, 你太小了.You always say that.你老是那麽说,I#39;m pretty big for my age.就年龄来说, 我已经很大了.Excuse me, there#39;s a big crowd over there. Business before pleasure.对不起先生, 那边有一大群人, 我先去做生意了.Certainly.那当然, 当然.Good-bye, Mr. O#39;Neill.再见, 奥尼尔先生.Bye, Ali. See you soon.再见, 阿里, 待会见.You know, Father, he isn#39;t really an ice cream man. He#39;s just pretending. He#39;s really a secret agent.爸, 你知道吗? 他不是真的冰淇淋小贩, 他是伪装的, 其实他是个密探.What an imagination you have, Ali!阿里, 你真会想象!More imagination than sense.想象超过常识.Don#39;t spoil it for him, dear. Childhood is the happiest time of life.不要责怪他, 亲爱的, 童年是一生中最快乐的时期.Hello.哈.Hi, Bill.嗨! 比尔.Oh, no. But it#39;s Saturday night!噢, 不, 今天是周末晚上!Yes, I know. But we never see each other these days. The children never see you, either.是的, 我知道, 但这几天我们彼此都没见面, 孩子也没见过你.And what about dinner? It#39;s almost y.那晚餐怎麽样? 我都快弄好了.I know. That#39;s the way it is. I#39;m just disappointed.我知道, 就是这样, 我只是很失望.Around 9:00? Well, OK. Wait. Why don#39;t you let me type your report? Then you could come home now.九点左右? 好罢, 等等, 何不将你的报告让我来打字? 那麽你现在就可以回来了.No. We don#39;t need any. We have lots of paper at home.不, 我们不需要, 家里还有很多纸.OK. Good. See you around 8:15. Bye, dear.好罢, 八点十五分再见, 拜拜, 亲爱的. /200809/47179

栏目简介:《趣味青春英语视频》是外语网络电台的精品节目,通过大讲堂的网络课堂形式,能够帮助英语学习者积累一些英语背景知识,并通过互动的教学形式,帮助有效记忆英语知识。本栏目是学习趣味青春英语的好材料。 Article/201607/451757

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Part 2(食) 3:单句-餐馆就餐英语口语900句文本下载 /200708/16704

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