derivatives

• The actual compound is considered to be a derivative or the parent compound .
  把实际化合物看作母体化合物的衍生物。
• It is interesting and enlightening to consider the derivative of a vector .
  这对研究矢量的导数来说是重要的，而且富有启发性。
• Derivatives of bromine are much more active than the corresponding one of chlorine .
  溴的衍生物的活性要比相应的氯的衍生物大得多。
• The function (f')is usually written simply f" and is called the second derivative .
  函数（f’）通常简写成f”，并称之为f的二阶导数。
• The derivative of the composite function is the product of the derivatives of the components .
  复合函数的导数是构成函数的导数之积。
• A quasilinear equation is one in which the highest-order derivative appears linearly .
  最高阶导数线性地出现的那种方程是准线性方程。
• The method set out above for computing partial derivatives is often used in economics .
  上面建立的计算偏导数的方法经常用在经济学中。
• The damping derivatives can only be determined experimentally in the wind tunnel or ballistic range .
  阻尼导数只能用风洞或弹道试验来确定。
• The decreasing character of a function with negative derivative can be proved by an analogous argument .
  负导数函数具有递减性的证明完全类似。
• these derivatives appear to undergo primary dissociation of a metal-phosphorus bond.
  这些衍生物似乎主要发生金属--磷键的断裂。