Danner says the CIA interrogators tried to keep Zubaida constantly awake for the three weeks he was strapped to the chair, spraying water in his face if he fell asleep.

VOA: standard.2009.03.23

Our immune system's function is to keep us healthy in the face of an environment where there are lots of things that could potentially harm us.

我们免疫系统的功能就是保持自身健康,在面对危机四伏的环境时,使我们免受伤害

耶鲁公开课 - 生物医学工程探索课程节选

you're the face, you're the person who's supposed to keep the troop, you know, the, the rank and file motivated.

你是球队的标志，是保持球队战斗力和激情的主心骨。

足球部队长的领导力 - SpeakingMax英语口语达人

It was then that he learned to keep his face straight.

ECONOMIST: M.R.D. Foot

Please keep smudging your face with dirt and wearing spacesuit-inspired get-ups with mountainous shoulder pads.

NPR: My Very Own Gagavolution

"It tickles a bit when it's applied, " Ms. Pavenooch said, leaning back and closing her eyes as she tried to keep a straight face.

WSJ: In Thailand, Those Seeking A Golden Glow Rush to the Spa