首先有一个主冷却系统，然后有一个备用系统，备用系统还有一个备用系统，再有一个备用系统的备用系统，如此下去。

There's the main cooling system, a backup to it, a backup to the backup, a backup to the backup to the backup, and so on.

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我们谈论的是，一个反应堆出现了破裂，在主系统的冷却系统，还有两端，闸床的破裂是什么？

So we're talking about a reactor that has a break in the primary cooling system and what is a double ended guillotine break?

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在产生高于平均热量的区域需装上通风和现场冷却系统，如在主洗衣房、客人洗衣房、干洗区、面包房和员工厨房等区域。

Ventilation andspot cooling systems will carefully planned in areas that generate aboveaverage heat, such as Major Laundry, Guest Laundry and Dry Cleaning, Bakeriesand Employee cooking areas.

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