Invertendo
反比定理
🗣️ 情景例句
Can we help?
我们可以帮忙吗？
I asked him to play with me, but he wouldn't.
我请他和我玩，但是他不肯。
He said that it would be possible to build a platform in the centre of the Channel.
他说，可以在隧道中央建造一座平台，这座平台将用作码头和火车站。