欧文斯和奥尔森假设，如果类胡萝卜素是稀有的或对健康有要求的，则通过着色指示的类胡萝卜素的存在在配偶选择的背景下将是有意义的。

Owens and Olson hypothesize that the presence of carotenoids, as signaled by coloration, would be meaningful in the context of mate selection if carotenoids were either rare or required for health.

youdao

通过收购实现全球扩张通常代价高昂，而通过内部增长实现扩张则非常耗时；在那些没有积极增长的市场上，实现扩张有时甚至是不可能的。

Global expansion through acquisition is usually expensive, and expansion through internal growth is time-consuming and sometimes impossible in markets that are not actively growing.

youdao

另一些人则通过已经使用多年的卡片来讲，通过磨损的边缘来判断。

Others lectured from cards that had served for years, to judge by the worn edges.

youdao

four-year-olds and five-year-olds are able to pass this task.

四岁五岁大的儿童则能够通过这个任务

耶鲁公开课 - 心理学导论课程节选

It's important--that's one reason why we want policies that encourage equality of incomes-- not necessarily equality, but reasonable equality-- because the people with very low wealth have a very high marginal utility of income and people with very high wealth have very little.

这非常重要,我们需要通过政策,来引导收入公平的一个原因就是这个,不是绝对的平等,是相对的平等,因为那些低收入的人群,对收出的边际效应相当的高,而高收入人群的则小得多

耶鲁公开课 - 金融市场课程节选

And if the government didn't provide for the poor as ten percent as you say through taxation, then we would need more money for police to prevent crime and so, either way, there would be more taxes taken away to provide " what you guys call the necessary things that the government provides.

如果政府不能,通过税收来补贴你所提到的10%的穷人，则需要花更多的钱雇警力来防止犯罪,所以，不管怎样，都需要交更多的税,提供你们所说的政府该提供的“必需品。

耶鲁公开课 - 公正课程节选