A California study found that as many as 45 percent of the emergency calls placed from cell phones in the state were frivolous or prank calls.

一项加利福尼亚州的研究发现，该州用移动电话拨打的紧急呼叫电话中，多达45%的是无谓轻率或者恶作剧。

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Cell phones can be quite useful in emergency situations but there is definitely a limit to how much they should be used.

紧急情况下电话确实是非常有用，但是对其使用一定也得有个限度。

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There are great recycling and refurbishing programs that use old cell phones as emergency dialers or resell them at discounted rates.

通过手机的回收和翻新，你就可以用相当优惠价格把旧手机作为备用或转售它们。

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If you have to be out, be prepared with a charged cell phone, an emergency kit with food, water, blankets, flares and a shovel.

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Mr Hardwick also said that, if there were to be an emergency, "the dysfunctional cell call bell system gave us no confidence that officers would promptly attend".

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ReliOn, a fuel-cell manufacturer based in Spokane, WA and focused on emergency-generation applications, reported that one of its customers hit by Hurricane Irene had 56 cell towers with fuel cells installed for backup power.

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