A surprising number of ailments are caused by unsuspected environmental factors.

惊人数量的慢性病是由未知的环境因素引起的。

《柯林斯英汉双解大词典》

Various environmental factors may play a role.

各种环境因素也可能会起作用。

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Genetics plays a part in determining lateralisation, but environmental factors have an impact too.

遗传在决定偏侧性方面起到了一定作用，但环境因素（对偏侧性）也有影响。

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Researchers believe a combination of environmental and genetic factors may be responsible.

VOA: special.2009.07.28

The researchers found that cultural and environmental factors make a difference.

VOA: special.2010.04.01

The art form reached its height during the Renaissance, when micro-mosaics were created for St.Peter's Basilica in Vatican City because traditional altar paintings were decaying from humidity and other environmental factors.

VOA: standard.2010.07.30

Genetics, socioeconomic factors, environmental factors and accidents all affect an individual's health outcomes and medical costs.

WSJ: Should Employees Get Insurance Discounts for Completing Wellness Programs?

But they fail fully to explain how, despite this and other countervailing factors, environmental action has still often proved possible.

ECONOMIST: A question of dodgy science

As a result, the males were more exposed to environmental factors that affected food resources.

BBC: Sex role reversal: Female shorebirds rule the roost