相关单词同义词leisure, sparetime, 近义词 extramarital 婚外的, adulterous 通奸的, additional 附加的, supplementary 补充的, optional 任选的, secondary 次要的, extramural （指大学教学﹑ 课程等）..., subsidiary 子公司, clandestine 秘密的(常指违法的行为)..., illicit 非法的, improper 不合适的临近词extra, extra gift相似词extracellular, extract, extraction, extractor, extraditable, extradite, extrajudicial, extramarital, 返回 extracurricular