sub

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[美國(guó)英語]

3. N-COUNT In team games such as football, a sub is a player who is brought into a game to replace another player. 替補(bǔ)隊(duì)員[非正式]

We had a few injuries and had to use youth team kids as subs. 我們有幾個(gè)受傷隊(duì)員，不得不用青年隊(duì)的孩子們作替補(bǔ)。

4. N-COUNT A sub is the same as a . 潛艇[非正式]