英语自学网 发表于 2016-7-14 23:40:26

每日英语：医生戴口罩的原因

　　医生为啥戴口罩
        　　Once a small child asked his father, "Father, why do doctors always have to wear masks in the operating room?"
        　　And the father replied, "In case something goes wrong, no one will know who they are."
        　
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