替换过程使用replace函数和正则表达式完成。
That's accomplished through the use of the replace function along with a regular expression.
根据曝气过程中氧转移的有关理论，推导出需气量的表达式；
The equation of air demand was derived from the theory of oxygen transfer in aeration.
根据曝气过程中氧转移的有关理论，推导出需气量的表达式；
The equation of air demand was derived from the theory of oxygen transfer in aeration.
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