当居民所住的地方有公交火车通行时，那里的居民通常比较苗条。这是因为往返于公交站点之间增加了运动量。
Residents tended to stay thinner when a commuter train was added to their region, because of increased exercise walking to and from stops.
美国火车通行证有折扣吗？
这类桥可供汽车与卡车通行，然而它与可供火车通行的桥梁有本质上的不同。
The type of bridge needed for cars and trucks, however, is fundamentally different from that needed for locomotives.
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