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Contaminant: a substance that makes sth IMPURE污染物,致污物
Municipal: 市的;市政的;市立的,市办的
He is in charge of the municipal housing project.
他主管该市建房计划。
Filter: 过滤
The water was filtered through charcoal.
这水是通过炭来过滤的。
Disclose: 揭发;透露;公开
This letter disclosed his secret.
这封信揭露了他的秘密。
She refused to disclose her name and address.
她不肯透露自己的姓名和地址。
Explore: 探究,探讨
The conference explored the possibility of closer trade links.
大会探讨了在贸易上进一步加强联系的可能性.
