数以万计的合成工业化学试剂，杀虫剂，金属和其他物质的毒性研究资料是有限的或者根本不存在。

There are tens of thousands of synthetic industrial chemicals, pesticides, metals, and other substances for which toxicological information is limited or nonexistent.

youdao

数以万计的合成工业化学试剂，杀虫剂，金属和其他物质的毒性研究资料是有限的或者根本不存在。

There are tens of thousands of synthetic industrial chemicals, pesticides, metals, and other substances for which toxicological information is limited or nonexistent.

youdao