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苏珊:
What`s my ideal weight? 
我的理想体重是多少呢?
玛丽:
It depends on your weight and body type.
这取决于你的身高和体型.
苏珊:
How can I avoid inuring myself during exercise?
在运动时.我如何避免运动伤害呢?
玛丽:
By warming up before and cooling down after your workout.
在健身之前要热身.健身后要做放松运动.