Studying this could help 16 why human evolution picked pace in the last 30,000 years, with social environment being a major 17 factor.
研究这可能有助于16人类进化在最近3万年中为何加快了步伐，社会环境是主要的17因素。
Another factor may be that more people are trying to overpack their carry-on bags to avoid checked-baggage fees, though the airlines strongly dispute this.
另一个因素可能是，越来越多的人试图在随身行李中装入过多物品，以避免托运行李费用，尽管航空公司对此表示强烈反对。
an essential factor in accomplishing any work
完成任何工作的关键因素
The scientific community measures the quality of those papers in a number of ways, including the perceived quality of the journal (as reflected by the title's impact factor) and the number of citations a specific paper accumulates.
科学界通过多种方式衡量这些论文的质量，包括期刊的感知质量（如期刊标题的影响因子所反映的）以及某篇具体论文所积累的引用次数。
Is there some common factor that underlies these apparently contradictory developments?
是否存在某种共同因素在背后推动这些看似矛盾的发展？
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。