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科学们

科学们

科学们

科学们

1

For more than 20 years , scientists have been trying to develop a vaccine to prevent HIV infection.

科学们花了超过 20 年的时间，在开发一个疫苗来阻止 HIV 感染

3

To begin with, scientists thought the Red Planet was as lifeless as the Moon , with dust storms swirling over vast sandy deserts .

始于尘沙笼罩下的广阔沙漠的图片，科学们认为这个 “红色星球 ”像月球一样没有生命。

4

Scientists have been puzzled for decades by how turtles manage to navigate across the Atlantic -- but now they know.

几十年来，科学们对海龟能穿越大西洋到迷惑不解 ――但现在他们找到了答案。

7

That embarrassing episode might help explain why NASA scientists were so quick to muzzle talk of another such "discovery" last week .

这个尴尬的小插曲也许能够帮助我们解释为什么 NASA 的科学们对上周类似的发现迅速闭上了嘴。

9

Scientists knew that a specific protein played a roll in eggshell formation.

科学们了解到一个特殊的蛋白对蛋壳的形成至关重要

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