toxic unit

例句：

1. 1. The chemical was found to be highly toxic to humans.
   这种化学物质被发现对人类极为有毒。
2. 2. The factory produces toxic waste that needs to be disposed of properly.
   该工厂产生有毒废物，需要妥善处理。
3. 3. The study found a correlation between the level of pollution and the toxicity of the water.
   研究发现污染水平与水质毒性之间存在相关性。