Both trains involved in the accident were above ground.
事故中的两列地铁都是行驶在地上的。
Historical accident put one of the world's biggest cities (23m) on such dangerous ground.
是历史偶然将这个世界上最大城市之一(2300万人口)放在了这么危险的地方。
Suddenly I pushed the cup onto ground by accident.
突然间我不小心把杯子弄到地板上。
Suddenly I pushed the cup onto ground by accident.
突然间我不小心把杯子弄到地板上。
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