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 kinetics of leaching process of zinc oxide ore is researched and it indicates that diffusion is the rate controlling step.

对氧化锌矿浸出过程动力学进行了研究，结果表明，扩散是浸出的速度控制步骤。

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The first step to controlling the outbreak is alerting the public about what not to eat.

FORBES: Spain's Irresponsible Rage On E. Coli Outbreak

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