似乎《有毒物质管理法案》实质上确立了安全性的假定，在要求对化学药品做进一步检查之前，环境保护局必须证明这个假定。
It seems that TSCA essentially establishes a presumption of safety, which EPA must overcome before it may require further testing of a chemical.
似乎《有毒物质管理法案》实质上确立了安全性的假定，在要求对化学药品做进一步检查之前，环境保护局必须证明这个假定。
It seems that TSCA essentially establishes a presumption of safety, which EPA must overcome before it may require further testing of a chemical.
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