经济学家很难预测石油的价格，因为他们的波动受各种各样因素的影响。
Economists are hard-pressed to predict oil prices since they are volatile and depend on various situations.
本文分析硬件可用性、软件可用性，以及各种各样的能力规划考虑与用户负载因素之间的关系。
This article examines the relationship between hardware availability, software availability, and the various capacity planning considerations and user load factors.
其他导致睡眠变化的因素，比如忧愁、慢性病或各种各样的药物也能导致记忆的衰退或精神不振，而这项研究并未对此作出解释。
Other sleep-altering factors such as depression, chronic diseases, or various medications — which the study didn’t account for — can also lead to memory loss or mental haziness.
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