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The search has narrowed down to a few streets.
搜查的目标已经缩小到几条街道了。
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The police have now narrowed down their list of suspects.
警方现已缩小了嫌疑犯人数的范围。
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In the end the choice was narrowed down to three people who might be suitable for the job.
最后只剩下三人可供选择, 看谁更适合干这种工作。