pith

n.（木）髓；精髓；要旨

v.去髓；破坏脊髓；杀死；瘫痪

The stem is hollow with pith cavity. 茎中空,具较大的髓腔。

Both the rubber and the pith ball are negatively charged. 橡胶棒和木髓球两者都带负电荷。

The pith of that theory is serving for people. 那个理论的精髓是为人民服务。

n.性质描述词；称号；浑名

n.上皮；上皮细胞

n.[生]上皮细胞

名词epithelium的复数.

adj.上皮的

adj.简练的；有髓的

脑脊髓剌毁法