Prefloat
预浮选
🗣️ 情景例句
Collecting matchsticks was fun, until that fateful day one of them caught alight.
收集火柴是一种乐趣，除非一天其中一根火柴不幸燃烧起来。
I don't care what you say.
我不在乎别人怎么说。
What is it?
什么呢？