中英释义：
双语例句
在有些城市，比如芝加哥，有高架火车，他们称之为高架线（El）。
In some cities, such as Chicago, they have an elevated train, which they call the El.
重点词汇
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高架
elevated; overhead; raised; highlevel; elevated structure; overpass; flyover; elevated road; viaduct
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火车
train; locomotive; local; choo-choo