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然后他发现自己犯了个错误，他走错了房间，这个房间上的号码是13。
Then he saw that he had made a mistake. It was the wrong room. The number on the door was number 13.
youdao
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然后他发现自己犯了个错误，他走错了房间，这个房间上的号码是13。
Then he saw that he had made a mistake. It was the wrong room. The number on the door was number 13.
youdao