[in sing.]an abundance or large quantity of something 丰富,充沛;大量 a rich profusion of wild flowers. 遍地的野花。 [mass noun]the beautiful pink foxgloves growing in profusion among the ferns. 蕨丛中开满漂亮的粉色毛地黄。
语源
mid 16th cent.: via French from Latin profusio(n-), from profundere 'pour out'. Early use expressed the senses 'extravagance', 'squandering', and 'waste'