Airbag
[机] 空气囊
🗣️ 情景例句
What was your GPA last semester?
你上个学期的平均成绩是多少？
I'm afraid you will miss your bus.
我怕你会错过公共汽车。
a wave length (the horizontal distance between two wave crests),
波长（两个浪峰间的水平距离）