Incrustant
水垢
🗣️ 情景例句
Why not?
为什么不能？
Our service has been very well-received by our customers so far.
到目前为止，顾客对我们的服务质量评价甚高。
It is fairly clear that sleeping period must have some function,
很清楚，睡眠必然具有某种作用。