how long ,例如是how long have you been there 你到那多长时间了或者是how often ,但是how often 是表频率的例如How often do you take medcine你多长时间吃一次药
多长时间英语怎么说
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how long ,例如是how long have you been there 你到那多长时间了或者是how often ,但是how often 是表频率的例如How often do you take medcine你多长时间吃一次药
