Liquidensitometer
液体密度计
🗣️ 情景例句
I'm glad our negotiation has come to a successful conclusion.
我很高兴这次洽谈圆满成功。
Could you hold the door open, please?
请让门继续开着好不好？
Some old people are oppressed by the fear of death.
有些老年人因为怕死而感到烦恼。