He was doing experiments in a gas discharge tube.

实验是在一个气体放电管中进行的。

麻省理工公开课 - 固态化学导论课程节选

This tube, this hollow tube, which food passes through is made up of many, many epithelial cells which directly abut one another and would be a flat sheet except that it's rolled up into a tube.

这个管道,这个中空的管道,食物可以穿行其中,而它就是由许多许多上皮细胞构成的,上皮细胞一个连着一个,形成了一个平坦的细胞层,但实际上它们还在肠管中卷成管状

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She is a PhD candidate in the department of music, just passed her qualifying exam with flying colors, so here she is to demonstrate the bassoon for us, lowest member of the woodwind family.

她是音乐学院的在读博士,刚刚以出色的成绩通过资格考试,她马上要为我们演奏巴松管,木管乐器中声音最低沉的乐器

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Or in many kinds of gas refrigerators where you push a gas through a nozzle close to room temperature, what you find is that the gas coming out on the other side under lower pressure is cooler than the gas that went through on the other side.

或者在很多种压缩气体式冰箱中,你让气体通过接近室温的管口,你会发现从压力低的一边,出来的气体比通过,另一边的气体更冷,真正的冰箱实际上通过。

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