世界卫生组织，区域中心，毒控中心，其满足条件，它来源研究或数据搜集计划。

World Health Organisation, a regional centre, a poison control centre which fulfils the condition that it does not derive from a study or any organised data collection scheme.

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对于每个元素，我们需要确定它的最佳来源。

For each element we need to identify the best source for it.

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这些适应性是相当合理的，使狐猿在夜间看得很清楚，并能从空心树枝深处取回幼虫，这是它的主要食物来源之一。

These adaptations are quite sensible, allowing the aye-aye to see well at night and retrieve grubs, which are one of its primary food sources, from deep within hollow branches.

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Glucose has to get into cells, that's the main source of energy source that cells use, metabolism of glucose.

但葡萄糖又必须进入细胞,因为它是细胞能量的主要来源,即通过葡萄糖代谢产生能量

耶鲁公开课 - 生物医学工程探索课程节选

But it's interesting to go a little further and think actually about what the concept means and where it comes from.

我们可以讨论得更深入些,想想这个概念的真正意义和它的来源

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And all of that is coming out of the heat of reaction, whether it's positive or negative.

所有这些都来源于反应热,它可以是正的或负的。

麻省理工公开课 - 热力学与动力学课程节选