The study compared patients who took three hundred twenty-five milligrams of aspirin at least two times a week with those who did not use aspirin.

VOA: special.2009.09.01

I usually try and go for a walk at least three times a week,

我一般一周至少散步3次，

愉快的音乐庆典 - SpeakingMax英语口语达人

I usually try and go for a walk at least three times a week,

我一般一周至少散步3次，

愉快的音乐庆典 - SpeakingMax英语口语达人