One of the most significant factors is what scientists call the "10, 000-hour rule."

这其中最为引人注目的因素在于被科学家称之为“10000小时”的规则。

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Changes in food needs, living standards, climate and other factors call for new avenues of research, according to the report.

根据该报告，粮食需求、生活水平、气候和其它因素的变化呼唤人类探索新的研究途径。

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The "Big Two," as scientists call the leading factors, are reduced exercise and increased food consumption: Americans are ingesting more and more calories than they're burning.

科学家认为主要有“两大”原因，即缺乏锻炼和食物摄入量的增加：美国人摄取的卡路里远比消耗的要多得多。

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In general, they tend to focus on a menagerie of what I would call secondary factors, while missing the foundational importance of the Magic Formula.

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We call these metrics Critical Success Factors, and we use Key Performance Indicators to find out how we are doing against them.

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But a whole variety of factors - the call-up of certain types of reservists, the chartering of commercial shipping, the reported movement of pre-positioned equipment both to and within the Gulf region - all suggests that if war comes, it could begin with far fewer signs of obvious preparation than many people have argued.

BBC: Bush considers military options