为了创造出非粘性的黏合材料，壁虎展示了范德华力的方式，分子间吸合或排斥的全部总和。

To create nonsticky adhesive materials, geckos showed the way to van der Waals force, the sum total of attracting or repelling forces between molecules.

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汤姆森教授在80年代后期在长满冰川百合的草甸买了一块偏僻的土地，建了一间小木屋，就开始了他的研究。

Prof Thomson began his research in the late 1980s after buying a remote plot of land and building a log cabin in a meadow full of glacier lilies.

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同样的，据2010年1月发表的一篇研究推测，在过去10万年间，海平面的涨落，使白令海峡交替开合。

Likewise, a study published in January 2010 concluded that, over the past 100, 000 years, rising and falling ocean levels alternately opened and closed the Bering Strait.

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And a sigma bond forms any time you have two orbitals coming together and interacting on that internuclear axis.

当你把两个轨道合在一起,并在核间轴上有相互作用时,就形成了sigma键。

麻省理工公开课 - 化学原理课程节选