A policeman was injured in the line of duty yesterday.

昨天有一名警察在执行公务时受伤。

《牛津词典》

More than 3,000 police officers were wounded in the line of duty last year.

去年三千多名警官在执行任务时受伤。

《柯林斯英汉双解大词典》

They were not surprised that he died in the line of duty.

对于他在自己岗位上殉职，他们并不吃惊。

youdao

Mr.Ban said he offers his deepest condolences to the colleagues who fell in the line of duty for noble causes and to their families and friends.

VOA: standard.2009.10.05

And all Americans are grateful for the lives that they gave in the line of duty.

WHITEHOUSE: President Obama Honors Fallen Law Enforcement Officers

Hiebert is the first journalist to be imprisoned in Malaysia in the line of duty.

CNN: ASIANOW - TIME Asia | Malaysia: Sued into Silence

Some of them are still recovering from gunshot wounds suffered in the line of duty.

WHITEHOUSE: President Obama Honors the Nation��s TOP COPS