Picnometer
n. 比重瓶
🗣️ 情景例句
sacrifices have to be made by one partner from time to time.
总要有一方必须不时做些牺牲。
Where can you pick up your suitcase?
你在哪里取你的手提箱呢？
We're not going to have any classes next week.
下周我们不上课。