Hairspring
n. 细弹簧, 游丝
📖 牛津释义
hairspring
n
fine spring in a watch, controlling the balance-wheel （表的）游丝（控制摆轮的细小弹簧）.
🗣️ 情景例句
I really feel bad about it,
我真过意不去。
Do you have any brothers or sisters?
你有兄弟或姐妹吗？
a wave length (the horizontal distance between two wave crests),
波长（两个浪峰间的水平距离）