The first process is the rate-controlling step.

第一个反应阶段为速率控制步骤。

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Double film theory shows that the mass transfer outside the droplets is the controlling step.

通过双膜理论分析得知，滴外传质是萃取过程的控制步骤。

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The rate-controlling step of resoluting N-acetyl-D, L-alanine with porous immobilized Aspergillus Oryzae cells was studied.

研究了固定化米曲霉菌光学拆分N-乙酰-D，L-丙氨酸反应过程的速率控制步骤。

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If either result is positive, it will be a big step towards controlling malaria.

ECONOMIST: Malaria research gets a shot in the arm

The cap, enacted as a step toward controlling property tax rates that are among the highest in the nation, generally restricts districts and local governments from increasing their tax levy by more than 2 percent or the rate of inflation, whichever is less.

WSJ: Teachers union challenges NY's property tax cap

The company said this weekend billionaire He Xiangjian, the controlling shareholder, plans to step down as chairman of the holding company.

FORBES: Lujiazui Breakfast: News And Views About China Stocks -- Aug. 27