They discovered that animals living in the enriched environment had higher levels of a protein called brain-derived neurotrophic factor (BDNF).

他们发现生活在复杂环境下的小白鼠有一种名叫脑源性神经营养因子（BDNF）的蛋白质水平较高。

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The formation of mankind's society is harmonious combination of the natural environment and mankind the oneself production, living etc, various main factor.

人类社会的形成是自然环境与人类自身生产、生活等各种要素的和谐组合。

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The occurrences of Eotetranychus kankitus Ehara are in very close relation with weather, natural enemy, living environment, human factor, etc.

柑桔始叶螨的发生与气候、天敌、生活环境和人为因素等关系十分密切。

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In addition to the high cost of living, the territory's deteriorating environment is a negative factor in the drive to attract high-tech.

CNN: HEADING FOR A PORT IN A STORM