问题描述：
再加一句:虽然他有70岁了,但他看上去很健壮
问题解答：
Li Lei swims better than Jim
although he is more than seventy-years old.but he looks very healthy ang young
although可不加
Li Lei swims better than Jim.
Though he is over seventy, he looks very healthy and strong
Li Lei than Jim swim well
Although he is 70 years old, but he looks healthy
Lilei is swimming better than Jim.Although he is seventy years old ,he looks strong.
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