单词：toxic chemicals
toxic chemicals的用法和样例：
例句
- In order to reduce the usage of virulent chemicals in the experimental process, the method to determine the proline content was improved.摘要为了减少实验过程中有毒性化学药品的使用，对测定脯氨酸含量的方法进行了改进。
- Chemicals were found in the river.在这条河里发现了危险的高浓度有毒化学物质。
- There is also considerable contamination by PCBs, toxic chemicals with carcinogenic effects.另有大量污染是由含有可致癌的有毒化学物质的印刷电路板所致。
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