If we land a man on the moon, I think someone could surely invent a toaster that works properly.
如果我们能让人类登陆月球,我想一定会有人能发明在月球上还能正常运行的烤面包机。
Why does aperson standing in a bus or train tend to fall when a sudden start is made?
一个人站在公共汽车或火车上,当车突然开动时,他为什么会倾倒呢?