sub

代课老师、代课教师口语，美式

Our regular teacher is sick, so we have a sub today.

我们的老师生病了，所以今天来了代课老师。

替补、替补球员口语

He started the season as a sub but now plays every game.

他球季开始时是替补，现在每场都上场。

潜水艇、潜艇口语

The sub stayed underwater for nearly three months.

那艘潜水艇在水下待了将近三个月。

潜艇堡、长条三明治美式

I ordered a turkey sub with extra cheese and no onions.

我点了一个火鸡肉潜艇堡，多加起司、不要洋葱。

字幕口语，常用复数

I can't follow the dialogue without subs.

没有字幕我听不懂对话。

订阅、订户口语

The channel gained ten thousand subs in a single week.

这个频道一周内就增加了一万名订阅。

代替、代班、代课口语

She subbed for me at the front desk all afternoon.

整个下午她都帮我在柜台代班。

替换、换人口语，多用于运动

The coach subbed him off after twenty minutes.

教练在二十分钟后把他换下场。

替补上场、上场替换口语

The young striker subbed in during the second half.

那名年轻前锋在下半场替补上场。