虽出人意料，但又有其经济、社会、文化及政策方面的必然原因。

Although it is unexpected, there are some inevitable causes of economy, society, culture and policy.

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在论述体育运动与现代消费关系的基础上，阐明体育运动成为时尚的必然原因。

Base on discussing the relation between PE sport and modern consume, the article clarifies the cause that sport become mode.

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贫困不是青少年越轨和犯罪的必然原因，因贫困产生的社会问题和主体变异却是青少年越轨和犯罪的重要原因。

Poverty is not the necessary reason for teenagers to commit transgression and crimes. It is the social problems and subjective changes caused by poverty that are really the reasons.

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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

But to bring it to United States and talk about our majority religion, we're gonna talk about Christianity and we're gonna talk about people who for religious reasons would like to see an amendment to the Constitution banning gay marriage.

讲到美国，讲到我们的,第一大教，就必然涉及到,基督教，必然讲到一些人,出于宗教原因而希望看到,宪法阻止“同性婚姻“

普林斯顿公开课 - 人性课程节选

One that seems to be in fashion these days, although you never know how long the fashion lasts, is: internal uprisings that somehow these monarchical areas, when life got tough, the people must have risen up against them.

有一个理论现在很流行,虽然不知道流行了多久,那就是认为,这些王国中起义的内部原因是,当民生困苦时,人们就必然奋起反抗

耶鲁公开课 - 古希腊历史简介课程节选