Frostline
[地]冰冻线,冻深线
🗣️ 情景例句
We hired a woman to watch Richard and then Susan,
我们雇用一名女士来照顾Richard ，后来又照顾Susan
The proof of the pudding is in the eating.
空谈不如实验。（实践出真知）
It doesn't matter.
没关系。