人来来往往，系统却不会。
那天路上交通繁忙，好几百个人来来往往，有走路的、骑骡的、驾着马车或拖车的都有。
That day there was a lot of traffic on the road and hundreds of people were coming and going, on foot and on mules, in wagons and in carts.
这个年轻人说：“当然了，我过去是个典型的逛购物中心的迷，喜欢在那里观看来来往往的人，特别是女孩子。 可是，后来我去打篮球， 进了球队，这样我就没法再浪费时间了。
Sure, I use d to be a typical mall rat hanging around watching the crowds, especially the girls.
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