动词
中文翻译：标记
同义词：
['mark', 'scan', 'record', 'document']
例句：
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1.The engineer marked the area for safety reasons.
工程师为了安全原因标记了区域。
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2.The policeman scanned the crowd for any suspicious activity.
警察在人群中扫描，寻找任何可疑的活动。
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3. The student marked his notes in the margins of the textbook.
学生在课本的边缘标记了他的笔记。