另一种常见错误就是为对尘螨过敏的孩子购买加湿器；孰不知加湿器是尘螨最易于繁殖的地方。
Another was using a humidifier for a child who was allergic to dust mites; a humidifier tends to be a place where dust mites like to breed.
我们那家店的书都异常有趣，但我怀疑能从其中挑出孰好孰坏的顾客不知有没有十分之一。
Our shop had an exceptionally interesting stock, yet I doubt whether ten per cent of our customers knew a good book from a bad one.
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