The leading area of study was business.

主要的学习领域是商业。

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As is expected, AI is an area where China may appear as a leading force.

正如预期的那样，中国可能会在人工智能这个领域成为主导力量。

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But in one area he is clearly leading the pack: job-title inflation.

但是在这一领域显然独领风骚：职位头衔泛滥。

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This is a research by one of the leading researchers, one of the first researches in the area of positive emotions, Alice Isen And she showed, time and again, how feeling good is good for us and good for others, and it works the other way as well.

一位重要的研究者，积极情绪领域的首批研究者之一，进行了这个研究，Alice，Isen。,她反复证明，感觉好如何对我们和他人都有益，反之亦然。

哈佛公开课 - 幸福课课程节选

Almost an afterthought in 2008, this is now the leading area for Chinese spending.

FORBES: Insight Into China's Overseas Investments

Cancer was the leading therapeutic area with 12 approvals, followed by rare diseases with 6.

FORBES: The FDA approvals of 2012: are we making progress?

The Euro Stoxx index of 50 leading euro-area equities has fallen by 15% since mid-March.

ECONOMIST: Business this week