sub

sʌb
Collins 2

英文释义

n a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States
n a submersible warship usually armed with torpedoes
v be a substitute

中文翻译

n. 补充人员, 部下, 潜水艇, 胶层, 订户, 傻子
a. 附属的, 次级的
vt. 替代, 转包
vi. 替代
[计] 子程式, 用户, 代替, 减法器

2
Collins 星级
9,196
BNC 频率
10,767
使用频率

记忆技巧

sub 是一个拉丁词根，意为“在……之下”或“次于”，常见于许多单词中，如 submarine（潜艇），表示“在水下的”。

例句

1. I ordered a sub for lunch today.
我今天午餐订了一份潜艇三明治。
2. He decided to sub for his friend in the soccer game.
他决定在足球比赛中替他的朋友出场。
3. The teacher asked the sub to help the students with their work.
老师请代课老师帮助学生完成作业。

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