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n.壁龛；合适的位置（工作等）；有利可图的缺口，商机； 变形： 复数：niches 英英释义： nichen.a position particularly well suited to the person who occupies it"he found his niche in the academic world"a small concavity同义词：recessrecessioncorneran enclosure that is set back or indented同义词：recess
