sexual union 短语 [网络] 两性的结合；性结合；性联合 释义与例句 n. 1. Sexual intercourse. 词汇关系 名词 同义词 5 union mating pairing coupling conjugation 上位词 2 sex sexual activity 下位词 10 service cross crossing servicing inbreeding assortative mating cross-breeding hybridisation hybridization interbreeding