单词	air crossing
释义	air crossing noun : a passage in a mine by which one airway crosses another compare overcast, undercast Word History First Known Use 1833, in the meaning defined above
随便看	trophic level trophically trophied trophies Trophis trophism tropho- trophobiont trophobioses trophobiosis trophobiotic trophoblast trophoblastic trophoblasts trophocyte trophoderms trophodynamic trophodynamics trophogenic trophogenist trophogenous tropholytic trophon trophonema trophonemata

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