Nevertheless, he says Ethiopia is among the countries where AIDS is spreading from several different sources.

VOA: standard.2009.11.15

Then we're going to take the newly formed vectors that now are recombinant, they're combined from at least two different sources.

然后就能得到这些重组的新载体,它们至少有两个不同的组成来源

耶鲁公开课 - 生物医学工程探索课程节选

It can come from animal sources and from vegetable sources, and the two have different impacts on health.

它可能来自动物,也可能来自植物,这两种对健康的影响各不相同

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

If you look at sources of these different carbohydrates, the glucose comes from fruit.

如果你研究这些不同碳水化合物的出处,水果中含有葡萄糖

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Now these were important changes because humans of course can-- are omnivores and can eat both plants and animals, and therefore, the ability to secure nutrients from these different sources became very appealing to humans.

这些是很重要的变化,显然人类现在,是杂食动物,能够进食植物和动物,因为营养来源的多元化,对人类来说很重要

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选