proper function meaning in Chinese

【数学】特征函数，常义函数。

We should guarantee proper functioning of chemical and biological oxidation processes .
我们得保证特定的化学和生物氧化作用的进行。
Maintain proper functions of toilets , drains and pipes
厕渠重维修、畅快乐无忧
Maintain proper functions of toilets , drains and pipes
厕渠重维修畅快乐无忧
The proper function of man is to live , not to exist
人的正确功能是生活,而不是生存
Maintain proper function of toilets , drains and pipes
保持厕所排水口及喉管正常运作：

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