Micalex
[电] 云母玻璃
🗣️ 情景例句
I'm exhausted. I had to work until 2 o'clock this morning.
我累死了。我一直得干到今天早上2:00。
Merry Christmas!
圣诞快乐！
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。