He is assiduous in performance of duty.

他勤勉履行职责。

youdao

He was assiduous in performance of duty.

他勤勉地履行职责。

youdao

Chapter 2 Performance of duty of notification of increasing risk.

第二章危险增加通知义务的履行。

youdao

I did not intend to fight unless it became necessary in self-defense and in the performance of official duty.

VOA: special.2010.02.15

"Since crime began its steady downward slide in 1992, more than 1, 100 federal, state and local law enforcement officers have lost their lives in the performance of duty, " Floyd said.

CNN: Coffins

In the Santa Monica case, Lohan is accused of giving false information to a police officer, obstructing or resisting a police officer in performance of his duty, and reckless driving, according to the city attorney's office.

CNN: January 7, 2013 -- Updated 0745 GMT (1545 HKT)

It's one of Sammy's higher-end ultraportable, available in Core i5 and i7 configurations and a choice of 128GB or 256GB SSDs, not to mention a 1GB AMD HD8570M GPU. That definitely smacks of heavy-duty performance -- compared to many Ultrabooks on the market, at least.

ENGADGET: Samsung Series 7 Ultra hands-on Hands-on