基本解释上唇同根派生 英汉例句the hypochile is saccate, ovoid and big while the epichile is relatively tiny, reflexed, undivided and transversely oblong or subreniform. 基段片囊状，卵形，巨大，先段片相对微小、反捲，不再细裂而呈横向椭圆形。epichil 上唇