Theoremproving
[计] 定理证明
🗣️ 情景例句
Thank you very much.
非常感谢。
I think it's about time we got going.
我想差不多是该告辞的时候了。
Why don't you buy a radio? Then you can listen to China Radio International or BBC English programmes on the radio.
你为什么不买台收音机呢？那样你就能听中国国际广播电台或者BBC英语广播节目了。