Metatheorem
[计] 元定理
🗣️ 情景例句
Next weekend ...
下周末……
He tries to button his own shirt,but he can't do it.
他试着扣好他的自己的衬衫，但是他不能做到。
It is better to ask for help at the beginning rather than to wait until a busy period when everyone is rushed off their feet.
最好在开始工作时就请人帮忙，而不是等到大学都忙得不可开交的时候。