两国之间交换商品的数量多少，是由许多复杂原因决定的。

The quantities of goods exchanged between two countries depend on complex forces.

youdao

正如银行“危机”，主权债务“危机”可以归因于某些方面至今没有答案的一些复杂原因。

Like the banking "crisis", the sovereign debt "crisis" can be ascribed to many complicated reasons that still leave certain aspects unanswered.

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在小说《红字》中，齐灵窝斯之所以由一个先前诚实、公正的人，变为毫无怜悯之心、疯狂折磨其仇人的恶魔，是有其复杂原因的。

In the novel of the Scarlet Letter, Chillingworth becomes a devil tormenting his enemy crazily and without any pity from an honest, fair person, which has complex reasons.

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Professor John Rogers: For a vast number of complicated reasons, Milton has invited for 350 years now a uniquely violent and I do think it's a violent response to the particular question of his value as a poet.

约翰·罗杰斯教授：350年来，由于很多复杂原因，对于米尔顿作为一个诗人到底有何巨大意义,人们的反应一直都很激烈,我确实认为是很激烈的反应。

耶鲁公开课 - 弥尔顿课程节选

The government has liberized the economy and that has of course been playing a role but the growth acceleration started almost a decade before that, so the factors are a little more complex.

印度政府让经济自由发展,这一决策显然是起了作用的,但在这一决策出现约10年前,印度经济的加速发展便开始了,所以经济腾飞的原因还比较复杂。

普林斯顿公开课 - 国际座谈会课程节选

So, to confine the individual, it seems, to one and only one sphere of life would seem to do an injustice to the internal psychological complexity that makes each of us who we are.

所以，将个人约束在，唯一一个人生阶层之中似乎不公,因为忽视了,内心的复杂度,而这正是让我们每一个人显得独特的原因。

耶鲁公开课 - 政治哲学导论课程节选