由专家控制时，生物防治安全、无污染并且能够自我分散。
When handled by experts, bio-control is safe, non-polluting and self-dispersing.
及时掌握和控制海水中的COD值，对于海洋的污染防治及监测具有极为重要的意义。
And it will be rather meaningful for oceanic pollution preventing and supervising to grasping and controlling the amount of COD in seawater in time.
该文介绍了工业和城市废水污灌，使其减量化、资源化的作用与效果，论述了后生污染控制及防治对策。
The paper introduces polluted irritation of industrial and urban wastewater and its effect of minimization, resource, then the epigenetic pollution control and prevention countermeasures are proposed.
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