许多研究小组利用整基因随机突变形成和重组方法，已成功的进行了酶的定向进化。
Many research groups successfully rely on whole-gene random mutagenesis and recombination approaches for the directed evolution of enzymes.
证券市场证券价格的运动可以划分为有明确趋势的定向运动与无趋势的随机波动。
The moving of the security-price in market can be set apart into two parts: the directional moving has obvious trend, and the stochastic fluctuation has no trend.
当今新农药创制的方法，归结为“模拟、随机、改造、仿生、定向”十个字，对此分别予以论述。
This paper reviews current approaches to pesticide discovery expressed in the words "imitation, randomness, modification, robotics, and orientation", with each area discussed separately.
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