People will lose weight when they slim down with a friend.
人们若和朋友一起减肥，就会减轻体重。
Of course, people put on weight when they consume more calories than they burn off.
当然，当人们摄入的能到超过他们消耗的能量时，体重就会增加。
You'd better check the weight when you buy things in the supermarket.
你去超市买东西最好验秤一下。
You'd better check the weight when you buy things in the supermarket.
你去超市买东西最好验秤一下。
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