你多长时间锻炼一次？
Peter, how often do you exercise?
彼得，你多常做运动？
Interviewer: How often do you exercise?
采访者：你多久锻炼一次？
How often do you exercise? You look fit.
你经常锻炼吗？你看上去很健康。
How often do you exercise? I exercise twice a week.
你多久锻炼一次？我每周锻炼两次。
How often do you take exercise?
你多久锻炼一次？
The subjects represented a variety of occupations in several different parts of the country and responded to an annual survey in which they were asked: how often and how strenuously do you exercise?
被调查对象代表着该国若干个不同地区的形形色色的职业，他们对每年度调查中的二个问题——你运动的频繁程度如何？运动的力度如何？——作出回答。
I personally feel this is an interesting exercise to do as you soon realize how little movement your eyes are often given when sitting in front of your computer.
我个人觉得，这是一个有趣的锻炼，因为你很快就会明白坐在电脑前时，你的眼睛运动的是多么少。
I personally feel this is an interesting exercise to do as you soon realize how little movement your eyes are often given when sitting in front of your computer.
我个人觉得，这是一个有趣的锻炼，因为你很快就会明白坐在电脑前时，你的眼睛运动的是多么少。
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