Wash your face too often — more than twice a day — and you can damage the natural lipid barrier, the protective mantle of lubrication that keeps skin looking and feeling healthy.

洗脸过勤--一天两次以上--你就可能损害皮肤天然的液体屏障，一种使皮肤看起来、摸起来健康的液体保护覆盖层。

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This can be a big blunder since excess washing can strip your face off its natural oil barrier. It can also make skin dry and this can be counter productive.

过度的洗脸，会把皮肤的天然面油给洗掉，这是一个很大的失策，还会使皮肤干燥或恰恰相反。

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When there is this type of communication barrier between parents and children, the big issues teenagers face can become bigger.

当父母与子女有了这类沟通障碍时，青少年面临的问题可能更大。

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Those chosen must come from poor families and must also face at least one barrier to getting a job.

VOA: special.2009.08.20

The species barrier they face may fully explain the difference in performance compared with children.

WSJ: The Brains of the Animal Kingdom

In his marvelously crass book, How to Get Rich, Felix Dennis, an immensely successful publishing entrepreneur, says the biggest barrier people face in their quest for wealth is the fear of failing in public.

FORBES: Come On Now, Hit 'Submit'

Almunia stood alone and exposed as a defiant one-man barrier in the face of a barrage of Barcelona attacks as Arsenal were comprehensively ripped to shreds by the quality of the holders' approach play.

BBC: Arsenal 2-2 Barcelona