These levels come from outside activities that penetrate the classroom structure, from teaching activities, and other noise generated inside, which can be exacerbated by room reverberation.

这些（噪音）可以是穿透教室建筑结构的室外活动声、教学活动的声音以及室内产生的其它各种声响，这些声音都会因为房间的回声效果而被放大。

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If you compare soils from a forest with soils that don't come from a forest, the amount of variability will most likely be greater in the forest's soil.

如果你比较来自森林的土壤和不是来自森林的土壤，森林土壤的变化量很可能更大。

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Some of the costs come from fees and benefactions, particularly towards research, but most have to be paid from public funds.

某些费用，尤其是科研费用，来自学费和捐款，但是多数费用还得由公共基金支付。

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When they come over here they may be isolated from their support network of family and friends.

VOA: special.2011.02.14

There are also audio recordings of the poets that we will be reading that come from Sterling and you can get to on the Center for Language Study website.

还会有一些关于诗人们的录音文件,在史德林图书馆里有，我们会在课上读到,这些文件你们可以在语言学习中心的网页上找到。

耶鲁公开课 - 现代诗歌课程节选

The plants can be deficient in certain things, especially fat soluble vitamins that come from meat and from essential amino acids.

植物中缺乏某些物质,特别是脂溶性维生素,那些只能从肉类和必需氨基酸中获得

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The largest segments of votes still to be counted come from Democratic areas.

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As Columbia University's Elliott Sclar, lead author of the UN's 2005 Improving the Lives of Slum Dwellers, observes, "secure tenure" would make it easier for slum dwellers to join the formal labor force, knowing that they aren't at risk of arbitrarily being forced from their homes and that their possessions will still be there when they come home from work.

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"We have quite simply been overwhelmed by messages of support and condolences of every type, from far and wide, and I know my mother would be pleased that they have come from all walks of life, " he told reporters.

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