您要查找的是不是：
- perylenequinones derivation 苝醌衍生物
- Taxpayer: what do you mean by the method of derivation? 纳税人：什么是以支出换算收入？
- Every sentence has a canonical derivation. 每个句子都有一个规范推导。
- Our derivation lacks rigour in this regard. 我们的推导在这方面是不严格的。
- Therefore, the derivation was also correct. 从而证明该推导是正确的。
- The derivation will not be given. 求导方法从略。
- Our derivation of the chain rule contains one flaw. 我们推导链式法则的过程中有一个漏洞。
- Derivation from a source; origin. 起源从某一源头起始；源头
- It's derivation involved no approximation. 它的推导过程不含近似处理。
- To make(a word)by derivation or composition. 衍生用派生法或复合法构（词）
- Refers to all derivation methods. 引用所有派生方法。
- The derivation of the poem isn't confirmed. 这首诗出处不详。
- A spirited circle dance of Provencal derivation. 法兰多舞普罗旺斯风格的一种活泼圆圈舞
- The custom is of Scottish derivation. 这种风俗起源于苏格兰。
- To make(a word) by derivation or composition. 衍生用派生法或复合法构（词）
- The custom is of Scottish derivation . 这风俗起源于苏格兰。
- The evaluation of partial derivation is quite simple. 偏微商求值十分简单。
- This paper is concerned with the derivation of optimum data... 本文介绍了求出......最佳数据的方法。
- Title： Studies on Fermentation Production of Perylenequinones and Mannitol from Ascomycetes Hypocreaceae Hypomyces (Fr.) Tul. sp. 关键词：菌寄生菌属真菌;苝醌类化合物;甘露醇;发酵
- Used in derivation from a verb,such as the suffix-er in teacher. 动词构成派生词时使用的在以动词派生的词中使用的，如“教师”teacher中的词缀－er。
