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search;comb;hunt for;scout around
警察徹底～了那個地區(qū)以尋找線索。The police combed the area for clues./在林海雪原中～殘匪comb through the snowy mountains and forests for remnant enemy forces/～飛行scouting flight/～枯腸cudgel (or rack) one’s brains (for fresh ideas or felicitous expressions)/～天線search antenna/～引擎（計算機(jī)）search engine