Long - term exposure to this medicine may sensitize you to the allergen.

长期使用这种药可能会使你易于过敏.

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Some studies link long term exposure to ultraviolet rays ( UV ) to cataract formation.

有些研究认为白内障的形成与眼睛长期暴露在紫外线下有关.

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However, the effect of long - term exposure to excess niacin on human health remains to be unclear.

然而, 长期 使用尼克酸对人类健康的作用还是不明确的.

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Long - term exposure to carcinogenic factors in the environment can cause cancer, called the environment ( of ) cancer.

长期 接触环境中的致癌因素还可引起恶性肿瘤, 称为环境 ( 性 ) 癌.

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