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汤姆和约翰望着远去的火车,评论起来。 汤姆:铁轨越往前就变得越狭窄,那么大的火车竟然不会掉下来,真是有本事！
Tom and John looked at the train going away and commented. Tom: The narrower the railroad becomes, the bigger the train will not fall off, the better!