Human error may have been a contributing factor.

人为的失误可能是一个起作用的因素。

《牛津词典》

Many policy makers insist that consumer spending is a strong economic catalyst and, therefore, a paucity of retail stores is a contributing factor to low-performing economies.

许多政策制定者坚持认为，消费者支出是一个强大的经济催化剂，因此，零售商店稀缺是经济表现不佳的一个促成因素。

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In addition, proper methods are a contributing factor in increased efficiency and positive learning outcomes.

此外，适当的方法是提高效率和产出正向学习成果的一个辅助因素。

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The lower prices associated with Hollister designer apparel has been a contributing factor for its success.

FORBES: ANF Rides Global Growth With Hollister But Stock $4 Too Expensive

Higher promotional activity to help lower inventory would also be a contributing factor to lower earnings.

FORBES: Weekly Market Wrap

Whether or not global warming is also a contributing factor is more difficult to say.

MSN: How Bad Is the US Drought?