You need about twenty minutes of exercise three times a week.
问题描述:
You need about twenty minutes of exercise three times a week.
答
你需要每周3次,每次20分钟左右的锻炼.
答
你需要每周做3次运动,每次20分钟。
答
同意大侠的版本.
答
你需要每周进行3次,每次大约20分钟的锻炼
答
你一周需要三次大约20分钟的锻炼