词典释义：
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effectivity - power to be effective; the quality of being able to bring about an effect.
效力-有效的力量；能够产生效果的品质。
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Flow rate had little influence on elution effectivity.
流速对洗脱效果基本没有影响。
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The rationality and effectivity of this method are shown by an example.
应用实例表明了该方法的合理可行性。
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Objective To study the effectivity and safety of type cesarean section.
目的观察新式剖宫术式有效性及安全性。
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The technology has high security and high effectivity etc preponderances.
该技术具有高安全性和高效性等多种优点。
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The effectivity of this method is illustrated by processing the practical data.
实际地震资料处理的结果说明了该方法的有效性。
词根 effect
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effective adj. 有效的，起作用的；实际的，实在的；给人深刻印象
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effectively adv. 有效地，生效地；有力地；实际上
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effectually adv. 有效地；全然；实质上
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effect n. 影响；效果；作用 vt. 产生；达到目的
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effectiveness n. 效力
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effector n. [生理] 效应器；[遗] 效应物；操纵装置