Barbara Frederickson, a leading international authority on the importance of positive emotions, says humans are genetically programmed to seek positive emotions such as love and joy.

芭芭拉·弗雷德里克森是研究积极情绪重要性的国际领先权威，她说，人类的基因决定了寻求积极情绪，比如爱和快乐。

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It is likely that the genes involved, which include genes that encode neuronal ion channels, have been subject to a positive selection pressure leading to an accelerated evolution of genetic changes.

与之其进化相关的基因，包括编码的神经离子通道的基因，可能受到了积极的选择压力，从而加速了基因变化的转变。

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About 22.5 million Africans are HIV positive, and AIDS is the leading cause of premature death on the continent, especially among productive young people and women.

非洲艾滋病毒阳性人数约为2250万人，同时艾滋病是本地区人口早亡的首要致因，青壮年和妇女尤为如此。

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The White House consulted with Pakistani leaders leading up to the announcement of its new strategy, and the initial response has been positive.

VOA: standard.2009.03.29

I see more and more organizations taking up positive psychology in their, as consultant companies, some of them the leading big consultant companies are taking it on.

越来越多的机构组织开设这门课，还有咨询公司，其中一些甚至是全球知名咨询公司。

哈佛公开课 - 幸福课课程节选

And also we are able to tap into the expertise of professors, not just at the University of Pennsylvania, but also at other schools as well so that we can bring in the very top leading researchers and practitioners of positive psychology.

我们还聘请多位教授，不局限于宾州大学，还有其他大学,我们请来最杰出的研究员,和积极心理学的从业者。

哈佛公开课 - 幸福课课程节选

Both properties were disdained by analysts and chewed up in the financial press, potent counter intuitive positive leading indicators.

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Furthermore, temporary worker hiring continued to be strong with 40, 000 jobs gained, which is normally a positive leading indicator for future job growth.

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So I think all of those are positive developments leading to what the U.N.

WHITEHOUSE: Press Briefing