Sigma.
[医] 千分之一秒
🗣️ 情景例句
I need multimedia capability for my system.
我的计算机系统需要多媒体功能。
I can come any time except Sunday.
除星期天外我都能来。
Four hundred! That's a lot of money. But, just this once. After all, this ball is very important.
400法郎！这倒是很大一笔钱。不过，就只这么一次。要知道，这次舞会很重要啊。