derivationn.派生；推导；来历衍生物；导数.derivation and history词源与历史derivational morphology派生形态学derivation action factor微商作用因数derivational roof caving诱导崩落derivation of word sense词义派生derivation of value added增值的由来derivation of phraseology语词探源derivation chromatography衍生气相色谱法derivation of word-forms构形法derivations of Lie algebras李代数的导子