Impactometer
碰撞(空气)取样器
🗣️ 情景例句
I have to cram all night for tomorrow's exams.
为了明天的考试，我得熬夜临阵磨枪。
I suppose it's difficult for you to do this.
我推测对你来说做这件事情是很困难的。
For one thing they keep the water clean.
一来，水下植物可以保持水的清洁。