subbing

柯林斯词典

sub /sʌb/ (subs)

1. N-COUNT A sub is the same as a submarine sandwich. 同submarine sandwich
2. N-COUNT A sub is the same as a . 同substitute teacher[美国英语]
3. N-COUNT In team games such as football, a sub is a player who is brought into a game to replace another player. 替补队员[非正式]
We had a few injuries and had to use youth team kids as subs. 我们有几个受伤队员，不得不用青年队的孩子们作替补。
4. N-COUNT A sub is the same as a . 潜艇[非正式]