这种药应该多久吃一次？
How often should I take this?
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解释
take 是本句的重点表达。
How often should I take this?
take 是本句的重点表达。
How often should I take this?
解释
How often should I take this?
take 是本句的重点表达。
在 App 中完整学习这张卡片
在 App 中学习