Impactometer
碰撞(空气)取样器
🗣️ 情景例句
Don't tell any one,
别告诉别人，
First, language is very important.
首先，语言是非常重要的。
For the first time in his life, he became the proud owner of a bed which had springs and a mattress.
他平生第一次自豪地拥有了一张既有弹簧又带床垫的床。