Which was -- back then it was sort of, you know, well, you know -- if you made this thing -- he made this little device, like kind of like a bicycle pump in reverse that could suck all the air out of -- you know what a bell jar is? One of these things, you pick it up, put it down, and it's got a seal, and you can see inside of it,
那时的情况吧 — 回头看看 你知道 — 如果你发明了这样的新鲜东西— 就像他发明了这个小小的真空泵， 其实就像是个自行车打气筒， 只不过是反过来工作的，把空气都抽出去 — 大家听说过钟形玻璃罩吧？钟形玻璃罩是这样的一个东西， 你把它拿起来，压回去，就密封住了， 但你还是可以看穿里面，