A security guard could be seen spraying a fire extinguisher pointlessly against a growing fire ball.
只见一名安保人员毫无意义地对着越来越大的火球，喷洒着灭火剂。
Loss prevention officers guard against fraud, theft, fire, weather damage, and other causes of property loss.
防损官员谨防欺诈，偷窃，火灾，天气灾害和其他引起财产损失的原因。
The laboratorys safety management primarily includes: fire prevention, anti-virus and guard against theft.
实验室的安全管理主要包括防火、防毒及防盗。
It is necessary to guard against a possible attack, so that we shall not be obliged to watch every night, or to keep up a fire.
我们必须对于可能遭到的进攻有防备，这样就不需要每晚守夜或是生火了。
It is necessary to guard against a possible attack, so that we shall not be obliged to watch every night, or to keep up a fire.
我们必须对于可能遭到的进攻有防备，这样就不需要每晚守夜或是生火了。
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