请帮忙看这个英语句子是否有问题,

题目

请帮忙看这个英语句子是否有问题,
As students often leave the heaters unattended,the risks are rather high should the water in the bottle boil dry while no one is around to turn off the power.
主要是后半句的should把我搞迷糊了.

答案

should在这里就是if的意思.好像是特别礼貌,正式的用法.在这里意思就跟if一模一样.也就是说“if the water in the bottle boil dry while no one is around to turn off the power.”其他还有说比如“Should you come...