Sigma.
[医] 千分之一秒
🗣️ 情景例句
I hope you have a wonderful time
希望你们玩得开心
It is more pain to do nothing than something.
什么都不做要比做一点更不好受。
The next evening the man upstairs came home from work late as usual.
第二天晚上，楼上人和平时一样很晚才下班回家。