相关单词近义词 opening 开口, space 空间, empty space 真空, 真空区..., void 空的, hole 洞, omission 遗漏, gap 缺口, caisson 弹药箱, coffer 保险箱, blank 空白的临近词lacy, lactose, lacunar, lacunae, lacunal, lacunary, lacunate, lacunarity, lacunar cell, lacuna skull, lacuna magna, lacunar stage 返回 lacunas