Mobile phase
[化] 流动相
🧩 词语组成解析
🗣️ 情景例句
Sorry, I have to say good-bye.
我不得不说再见了。
How often did I tell you to keep quiet?
我告诉你多少次要安静?
He calls at every house in the street once a month and always asks for a meal and a glass of beer.
他每月对这条街上的每户人家光顾一次，总是请求给他一顿饭和一杯啤酒。