While the two immigration waves differ greatly, both were driven by a complex multitude of political historical and environmental factors.

虽然两次移民浪潮差异很，但两者都是由复杂的多政治、历史和环境因素驱动的。

There's history here, too, as Finland was invaded by the Soviet Union in 1939 in what was named The Winter War, which happened at the beginning of World War II.

这是由历史因素导致的，1939年芬兰在第二次世界始时被苏联入侵，史称“冬季争”。

These include things such as environmental conditions in which the animals live, sex-specific growth, survival and reproduction through the history of the species.

包括诸如动物生活的环境条件，性别特异性增长，物生存和繁殖的历史等因素。

And the first major factor to consider here is history.

首先需要考的重要因素是历史。

And the other main historical factor that has added to the confusion of English is that there are simply so many people from so many different countries that speak it, leading to differences in word use and pronunciation.

而且另一个导致英语混乱的主要历史因素是， 说这语言的人来自如此多不同的国家，这导致了词汇使用和发音上的差异。

The degree with which you live with that fear to the point where it doesn't allow you to let people in at a level that you would like, that's psychological, that's historical.

你恐惧共处的程度， 以至于它阻止了你让他人以你期望的深度进入你的生活，这既是心理层面的， 也源于历史因素。

See, from macroeconomics, to historical factors, to even biological facts about a person, these things all play an undeniable role in how someone may be struggling in life.

从宏观经济学， 到历史因素，乃至个人的生物学事实，这些都在一个人如何在生活中挣扎的过程中扮演着不可否认的角色。

And it's not to say that this is the entire reason because obviously things like there's many different variables and factors and it's a complicated history.

这并不是说这就是全部原因，因为显然存在许多不同的变量和因素，历史本身也颇为复杂。

One possibility is that the genes and health of Eastern European Jews were affected not simply by geography but also by historical and cultural factors.

一可能性是，东欧犹太人的基因和健康不仅受到地理因素的影响，还受到历史和文化因素的影响。

And they argue that Modernization Theory sweeps a lot of historical factors under the rug when it explains European and North American progress.

他们认为现代化理论在解释欧洲和北美进步时，忽视了很多历史因素。

And so you have this sort of weird set of historical factors, like, operating at the same time.

因此，你看到了这样一组奇特的历史因素同时发挥作用。

The myriad factors affecting innovativeness make the historian's task paradoxically easier, by converting societal variation in innovativeness into essentially a random variable.

矛盾的是，通过将创新性的社会差异转化为本质上的随机变量，影响创新性的无数因素使历史学家的任务变得更加容易。

As term of a nineteenth-century education, one sought a common factor for certain definite historical fractions.

作为 19 世纪教育的术语， 人们寻求某些特定历史部分的共同因素。