Helium is used for arc welding and leak detection, mostly, although NASA USES it to pressurize space shuttle fuel tanks.

虽然美国宇航局用它来给航天飞船的燃料箱加压，氦主要还是用来做弧焊和裂纹检测。

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In some cases, new and abnormal blood vessels grow, and in other cases, existing blood vessels swell and leak, according to the U.S. National Eye Institute.

美国国家眼科研究所的研究者认为，该病变在某些情况下可表现为新生及异常血管的增生，而在另一些情况下亦可表现为原有的血管发生肿胀及渗出。

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Preliminary analyses of images like that shown above indicate that the smooth regions around the middle are porous and leak frozen water vapor directly out into space.

对如上图之类照片的初步分析表明该彗星中间光滑的区域有许多孔状结构，正直接将冰块泄漏到宇宙中。

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BP is trying different ways to stop the leak from a damaged undersea well and control the spilled oil.

VOA: special.2010.05.04

And this fluid eventually starts to leak out and those lesions would heal, but they leave scars in most cases.

这些液体最终会流出来,伤痕也会痊愈,但大部分情况下会留下疤痕

耶鲁公开课 - 生物医学工程探索课程节选

The sky leaked all over all of it, and then it began to leak in to the car.

天空就像四处在漏水，然后车里开始进水。

耶鲁公开课 - 1945年后的美国小说课程节选

You wish that you might become a vapour, and leak away through the lift walls.

ECONOMIST: Liz Claiborne

Most cancers are the result of unusual changes in your DNA. Chromosomes break and leak into each other, for example, changing a gene's basic essence and sometimes triggering abnormal growth.

FORBES: The Reductive Outsider

What is certain is that only a few Romney hands know the details of the vice presidential selection process, making this year's iteration of the "veepstakes" -- a quadrennial feeding-frenzy of gossip and often ill-informed speculation -- one of the most secretive and leak-free endeavors in recent memory.

CNN: Romney risks playing running mate hand too early