Micropycnometer
微型比重瓶
🗣️ 情景例句
He ofter overdrafts his account.
他的账户经常透支。
Life is a battle from cradle to grave.
人生是一场从生到死的战斗。
Instruments have been devised and can be so placed that all three elements can be recorded in different graphs.
已经设计出了一些仪器，它按照一定的安放方式就可测绘出这三种运动的曲线图。