A few kids may have had a low level exposure, but severe poisoning from the toys alone is pretty unlikely.

一小部分孩子呢，可能已经有低程度受铅影响，但单单说要这些玩具使得孩子严重铅中毒还是相当不可能的。

youdao

The National Institutes of Health (NIH) has also launched a $30 million study on the safety of low level exposure to BPA.

美国卫生研究院（NIH）也启动三千万资金展开对低剂量BPA安全性的研究。

youdao

At present, there is insufficient data to draw firm conclusions about health effects from long-term low-level exposure typically occurring in the everyday environment.

目前，关于通常发生在日常环境中的长期低剂量辐射对人体健康的影响，仍缺乏足够的数据来做出强有力的结论。

youdao

The report does not rule out other possible contributors to Gulf War illness -- including low-level exposure to nerve agents and close proximity to oil well fires -- though it fails to establish any clear link.

CNN: Gulf War illness is real, new federal report says

Previous research has indicated that low-level lead exposure may increase the risk of a number of chronic age-related diseases.

BBC: NEWS | Health | Lead exposure link to cataracts