Sigma.
[医] 千分之一秒
🗣️ 情景例句
I'm with you.
我支持 。
It wasn't any bother.I was glad to do it.
不麻烦.我乐意做。
I was so excited that I wanted to tell the whole world what we had found.
我激动得想要告诉全世界我们发现了什么。