mass [mæs]

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n.块，大多数，质量，大量，群众，弥撒；adj.群众的，大规模的，集中的；vt.使集合

having an effect on or involving a large number of people or forming a large amount

She had a mass of auburn hair. 她有一头浓密的棕发。
There is a mass of stones in the yard. 院子里堆放着一大堆石头。