短語詞組短語derivation conduit 引水道derivation block 微分單元derivation step 推導(dǎo)步theoretical derivation 理論推導(dǎo)leftmost derivation 最左推導(dǎo);[計]最左派生;最左端導(dǎo)出式;最左導(dǎo)出Derivation proceeding 溯源訴訟程序;溯源程序;派生程序characteristic derivation 特陣導(dǎo)derivation key 衍生金鑰 返回 derivation