How often do you exercise?

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。