Adopt international science-based standards to limit human exposure.

采纳有科学依据的国际标准以限制人类暴露。

Widespread epidemics in birds increase opportunities for human exposure.

禽类中的广泛流行增加了人类暴露的机会。

In one study, tap water accounted for up to 20 percent of human exposure to lead.

一项研究表明，自来水占人体所接触到的铅的20%。

Methods: The controlled human exposure experiment was applied in this study.

方法：采用控制暴露人体实验。

These studies provide an assessment of human exposure to dioxins from all sources.

通过这些研究，对人类对各种来源的二恶英的接触进行了评估。