Uptime
[计] 可用时间, 正常运行时间
🗣️ 情景例句
I'm surprised they're not here.
我奇怪他们怎么没来。
I'm always confused with s and th.
我常把s和th搞混。
Excuse me, are you from England?
对不起，问一下，你是英国人吗？