The theory involves laws of preparation, laws ofp ractice, laws of effect.

其学习规律理论主要包括：准备律、习律和效果律。

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The aim of the agreement was to prevent the improper use of the country's bank secrecy laws, and its effect was to curb severely the system of secrecy.

该协议的目的是防止人们不恰当地使用该国的银行保密法规，它的效果是严厉遏制保密制度。

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The traffic laws don't take effect until the end of the year.

交通法要到年底才生效。

《柯林斯英汉双解大词典》

A new study has found the strongest evidence yet that smoke-free laws can reduce a major effect of tobacco smoking - heart disease.

VOA: special.2009.01.07

It's determined by the laws of nature that the effect that follows will follow from that cause.

自然法则决定了,这个结果必然跟随这个原因产生

耶鲁公开课 - 死亡课程节选

Taking a page from the physics of Isaac Newton, Marx argued that similar laws of cause and effect determine the course of history.

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These ticket-holders were limited in number which proved the laws of scarcity in effect: few items available of a buzzworthy thing mean a race to get your hands on it before anyone else does.

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The new regulation is just one of myriad laws taking effect July 1.

CNN: July 1 brings new, sometimes quirky laws