Exposure to sun, however, is the one important risk factor that patients can do a lot about.

然而，黑素瘤的另一大致病因素，日光暴晒，则是病人们可以避免的。

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Epidemiological investigation identified a possible risk factor as exposure to wild bird faeces found around the house.

流行病学调查发现，接触其住房周围野禽的粪便可能是一个风险因素。

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And that legal distinction between the definition of a "toy" and of other "children's products" seems to be the complicating factor in the effort to regulate children's exposure to dangerous items.

“玩具”和“儿童产品”的定义在法律上的区分，似乎给管制儿童接触危险物品的努力增添了复杂的因素。

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"Exposure to tobacco smoke is a risk factor for cardiac disease already in adolescents, and that's why this study supports that children and adolescents need smoke-free environments."

VOA: standard.2010.03.04

During the past 20 years, investors have steadily increased their exposure to this factor, so that on average, more than 20% of the equity portion of all retirement accounts could be affected.

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Lack of exposure at auction may be one factor.

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One common factor is that each of them has high European exposure.

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