Arepycnometer
[化] 稠液比重计
🗣️ 情景例句
He keeps himself fit by running 5 miles every day.
他每天跑五公里以保持身体健康。
I'm the luckiest person in my class.
我是我的班级中最幸运的人。
I caught the last bus.
我赶上了最后一班车。