Something was missing, you know. I mean, these are -- it's kind of weird to think that someone had to do an experiment to show that, but that was what was going on at the time.
这就说明有什么东西被抽走了，要知道，我是说，这些事 — 想想有人需要做这些实验来证明空气的存在是有点怪怪的， 但是当时的确是这种情况。