短語詞組短語derivable e 可導(dǎo)Derivable map 可導(dǎo)映射conjugate derivable 共軛可導(dǎo)derivable cone 可導(dǎo)錐derivable number 派生數(shù)derivable symbol 符號(hào)可衍生directly derivable 直接可推導(dǎo)weak derivable 弱可導(dǎo) 返回 derivable