单词：on the front
前线
on the front的用法和样例：
例句
- There's something interesting on the front page.头版上有些有意思的消息。
- The news appeared next day on the front page.那则消息次日刊登在头版上了。
- We must put a new lock on the front door.我们得在前门上安一把新锁。
- Write your name on the front cover of the exercise book.在练习簿的封面上写上你的名字。