突然火车汽笛声使我醒悟过来，我自己还不知道陷入沉思已走了很远。
The sudden sound of the train whistle brought me to myself; I had not know how far I had been walking, deep in thought.
突然火车汽笛声使我醒悟过来，我自己还不知道陷入沉思已走了很远。
The sudden sound of the train whistle brought me to myself; I had not know how far I had been walking, deep in thought.
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