标签：sperm 相关文章
From NPR news in Washington, I'm Louise Schiavone.Water levels are receding after days of severe winter flooding in the St. Louis area. But as NPR's Martin Costi reports things are still grim farther downstream. As the Mississippi and its tributaries
2016年NPR美国国家公共电台1月
Betty is talking to her husband Dan B: Don't you think it's time that we had a baby? D: We're much better off without children. Think of all the trouble raising them. B: But it's only natural that mar
赖世雄中级美国英语
介绍: From William Golding I think women are foolish to pretend they are equal to men,they are far superior and always have been.Whatever you give a woman,she will make greater.If you give her sperm,she'll give you a baby.If you give her a house,sh
《学会英语发音》初阶英语拼读系列 第六册
The Brygmophyseter was not without a weakness. 四贺鲸不是没有缺点。 Unlike Megalodon, it was unable to re-grow lost teeth. 它不像巨齿鲨，它无法长出掉落了的牙齿。 It did, however, have another weapon at its disposal. 但是，
侏罗纪搏击俱乐部
And they have the blemish both front and rear from a facet where the opposite tooth interlocked with it. 在牙齿前后的齿面都有缺陷就是与对面牙齿相交错的地方。 What happens is that the root is anchored well into the lower jaw.
侏罗纪搏击俱乐部
LIFE IN THE OCEAN The earth's oceans can reach depths of up to 11,000 metres. That is deep enough to cover Mt Qomolangma! The oceans are incredibly large and contain several different habitats. To make it easier to describe the various parts of the
人教高中英语高二
Section(B)Who Will Take Advantage of Human Cloning? Last week's news that scientists had cloned a sheep sent academics and the public into a panic at theprospect that humans might be next. That's an understandable reaction. Cloning is a radical chall
新视野大学英语读写教程(3)
Japanese Man Wins Legal Right to 13 Children Born in Thailand A Japanese businessman who won a child custody case in Thailand is largely unknown in his home country. Mitsutoki Shigeta is the son of the owner of Japanese telecommunications and insuran
2018年VOA慢速英语(二)月
LIFE IN THE OCEAN The earths oceans can reach depths of up to 11,000 metres．That is deep enough to cover Mt Qomolangma! The oceans are incredibly large and contain several different habitats．To make it easier to describe the various parts of the
高中英语听力人教版第二册
AILSA CHANG, HOST: Scientists recently made headlines when they announced they had figured out how to edit DNA in human embryos for the first time. This week, the scientists invited NPR health correspondent Rob Stein into their lab in Portland, Ore.,
2017年NPR美国国家公共电台8月
Protamine sulfate is a drug that reverses the anticoagulant effects of liver compounds such as heparin. Protamine is extracted from the sperm of salmon and other species of fish, and then made into a protamine sulfate injection which is a necessary d
世界各地新闻集锦
Science and Technolgy. 科技。 reproduction. 人类繁衍。 Life begins at 45. 45岁也能生娃。 Hope for older mothers. 高龄母亲的福音。 WHEN it comes to reproduction, men have it easy. Almost to the end of their lives most have an amp
经济学人科技系列
Reasons why premarital sex is unhealthy The risk of dying Everyone realizes having sex before marriage can have dangerous consequences. Even condoms避孕套 and other 'safe sex' devices, there is sti
阅读空间
Fertility experts are warning man that using a mobile for as little as an hour a day is cooking sperm and lowering level significantly. 生育专家警示男性：每天玩手机的话，即使只是玩一个小时，都是在煮精子，会大大降低
阅读空间
All Cacilda and I have done is extend this sharing behavior to sexuality. 我和卡希尔达只是将这种分享行为扩展到了性上 So we've argued that human sexuality 我们认为人类的性 has essentially evolved, until agriculture, 直到农
TED演讲科学篇
Nor, considered aright, does it seem any argument in favor of the gradual extinction of the Sperm Whale, for example, 而且，正确地考虑一番，似乎也还提供不出任何论据，足以证明抹香鲸会逐渐趋于灭亡，比如说， th
白鲸记
How obvious it is it, too, that this necessity for the whale's rising exposes him to all the fatal hazards of the chase. 鲸既然必需这样冒出水面来，那么，它显然就有遭到追击的一切生命攸关的危险了。 For not by hook o
白鲸记
BOOK I. (Folio) CHAPTER IV. (Hump Back).--This whale is often seen on the northern American coast. 第一篇(对开型) 第四章(座头鲸)...这种鲸常见于北美洲沿海一带。它经常在那边被捉到后,拖进了港埠。 He has been fre
白鲸记
Wherefore, you must now have perceived 因此，你现在一定看得出， that the front of the Sperm Whale's head is a dead, blind wall, without a single organ or tender prominence of any sort whatsoever. 抹香鲸头的正面就是一堵没有窗的
白鲸记