He says: I have met them at close of day Coming with vivid faces From counter or desk among grey Eighteenth-century houses.

他说：,我曾在黄昏时遇见他们,他们离开柜台或写字台,脸上带着生动的表情,从18世纪灰黑的房屋里走出。

耶鲁公开课 - 现代诗歌课程节选

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。

麻省理工公开课 - 热力学与动力学课程节选