相关单词近义词 hollow 空的, sunken 沉没的, depressed 沮丧的, dished 中凹的反义词convex, 中凸的临近词conceal, concatenate, concaver, concaveup, concave up, concave die, concave bow, concaveness, concave key, concave bar, concave saw, concavedown 返回 concaved