n. soft spongelike central cylinder of the stems of most flowering plantsv. remove the pith from (a plant)
n. 木髓, 骨髓, 要旨, 重要性, 力量, 核心, 意义, 精华vt. 从(植物茎)中取髓, 刺毁(动物的)脑脊髓