The first and the third can be key factors in the structure of a biological community; that is, all the populations of organisms living together and potentially interacting in a particular area.

第一个和第三个可能是生物群落结构的关键因素；也就是说，所有的生物种群都生活在一起，并且它们可能在一个特定的区域内相互作用。

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On the new model farms of the future, precision will be key.

在未来的新型农场中，精密度将是关键。

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Some of the money could be spent on persuading key specialists to stay in the Services.

可以花费一部分资金挽留重要专家在军队工作。

《柯林斯英汉双解大词典》

Finance Minister Hirohisa Fujii says the key to Japan's economic recovery will be a policy that puts money in the hands of taxpayers.

VOA: standard.2009.10.27

No. 2, we believe that young people have to be a key part of building that ethos One of the reasons for that is purely demographic.

其次，我们认为青年人,必须成为建立该社会风气的主力,其中的一个原因,纯粹是从人口统计学来考虑的。

普林斯顿公开课 - 人性课程节选

To be sure, Machiavelli focuses on key aspects of political reality which are often ignored by thinkers like Plato and Aristotle.

事实上马奇亚维利所专注的,政治现实观点,是其它思想家所常遗漏,像柏拉图和亚里士多德。

耶鲁公开课 - 政治哲学导论课程节选

Depressive symptoms stand out as particularly strong predictors of youth violence and aggression, and therefore current levels of depression may be a key variable of interest in the prevention of serious aggression in youth.

FORBES: Videogames did not cause the Connecticut shooting

"Ensuring a lasting sporting legacy for young people in the UK will be one of the key focuses of this government over the next two years and beyond, " he concluded.

BBC: Olympics debate

Of course, the level of Welsh involvement in that process will be key in terms of who actually gets the top job.

BBC: The hunt for a new 'Sir Humphrey'