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试管婴儿有风险吗？

In the 24 years since the birth of Louise Brown，the world's first test－tube baby，thousands of would－be parents have been assure that as far as scientists knew there was no extra risk of genetic damage associated with in－vitro fertilization，

发表于:2018-12-05 / 阅读(32) / 评论(0)

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霍金披露想象中外星生物形态

The physicist Stephen Hawking has designed what he believes to be what extra-terrestial creatures might look like this weekend。 The creatures were conceived with hostile extra-terrestial environments in mind, including planets colder than -150C, sa

发表于:2019-01-07 / 阅读(96) / 评论(0)

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亚伯拉罕.林肯的葛底斯堡演说词

Gettysburg Address Delivered on the 19th Day of November, 1863 Cemetery Hill, Gettysburg, Pennsylvania Fourscore and seven years ago, our fathers brought forth upon this continent a new Nation, conceived in Liberty, and dedicated to the proposition t

发表于:2019-01-08 / 阅读(36) / 评论(0)

英语演讲

英美人天天都在说的4000句 129:open a can of worms

[00:01]C：I've managed in a few decades to marry the two most worthless men in the universe and then proceeded to have the three most ungrateful children ever conceived. [00:10]The only reason people are nice to me is because I have more money than

发表于:2019-01-14 / 阅读(200) / 评论(0)

英美人天天都在说的4000句:跟着影视学最真实的口语

英语小达人 398 The Gettysburg Address

The Gettysburg Address 葛底斯堡演说 Fourscore and seven years ago our fathers brought forth on this continent a new nation, conceived in liberty, and dedicated to the proposition that all men are created equal. 八十年前，我们的先辈在这

发表于:2019-01-28 / 阅读(24) / 评论(0)

英语小达人

Gettysburg Address 葛底斯堡演说

Gettysburg AddressFourscore and seven years ago, our fathers brought forth upon this continent a new nation, conceived in liberty and dedicated to the proposition that all men are created equal. Now, we are engaged in a great civil war, testing wheth

发表于:2019-02-08 / 阅读(98) / 评论(0)

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atomic disintergration

be the derision of...