In order to guard against damage during trauma, the brain releases protective chemicals that also happen to trigger intense hallucinations.

为了在心灵受创伤之前避免受到伤害，大脑会释放出防护性的化学信号，同时也会引发强烈的幻觉。

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VENT GUARD? Is a protective enclosure designed exclusively for the air release valve found in many public water supply systems.

通风口的保护外壳设计，专用于许多公用水供应系统中的空气释放阀。

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Why doesn't he wear any protective headgear to guard against radiation in the rat experiment?

为什么他在老鼠实验中没有穿戴任何核保护措施？

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Many leagues now recommend or require that pitchers wear a heart guard, a protective chest pad.

WSJ: Little League Bans Composite Bats

There's even a protective layer of splash-guard coating.

ENGADGET: Motorola's RAZR HD LTE coming 'exclusively' to Rogers in Canada later this fall

It will require evidence of what the organisation knew about the risk posed by Savile, what complaints it received and what protective measures it put into operation to guard against that risk.

BBC: UK