n. undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities
词态变化
复数形式:pollutions
常见例句
1
a intended to reduce pollution
2
or having clean habits s free of restrictions or qualifications s (of sound or color) free from anything that dulls or dims s free from impurities s (of a record) having no marks of discredit or offense a ritually clean or pure a not spreading pollution or contamination
3
in a manner that minimizes dirt and pollution r
4
make clear v free from payment of customs duties, as of a shipment v clear from impurities, blemishes, pollution, etc. v yield as a net profit v make as a net profit v earn on some commercial or business transaction
5
n someone who works to protect the environment from destruction or pollution
