The room which accident occurred may need to be double locked for further investigation purposes.
发生事故的房间需要被双锁，以便更进一步的调查。
The next day, he found that the door of some neighbours locked double - locked.
第二天，他发现偶好几家邻居的门上都上了双把锁。
The next day, he found that the door of some neighbours locked double - locked.
第二天，他发现偶好几家邻居的门上都上了双把锁。
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