Metatheorem
[计] 元定理
🗣️ 情景例句
One piece of advice.
给你一句忠告。
Timid dogs bark most.
狗胆小，拼命叫。
Let us suppose that a child suddenly crosses the road in front of you.
让我们假设一个小孩子突然在你前面穿过马路。