问题描述：
英语译成中文（书长71）
A doctor once told me,"With the right medicine,a cold will last for seven days."(这里的 once 如何译?）劳驾!
A doctor once told me,"With the right medicine,a cold will last for seven days."(这里的 once 如何译?）劳驾!
问题解答：
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