Insanitation
n. (环境的)不卫生(状态),卫生设施的缺乏
🗣️ 情景例句
When was your reservation?
您预定的是什么时候？
I'll check into it and get back to you.
我查对一下然后送还给你。
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）。