相关单词近義詞 down 曏下, underground 地下的臨近詞undersea, under, underwinding, Under Collar, undercurrent, underperform, underseepage, undergarment, underservant, undertrained, undersanding, under canvas相似詞underemployed, underestimate, underexpose, underfloor, underfunded, undergarment, undergird, undergo, 返回 underfoot