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污染程度 wūrǎn chéngdù
earth.sc.	contamination level
met.	extent of pollution
oil	degree of damage
refrig.	amount of fouling
tech.	contamination degree; content of pollution; soiling procedure
weld.	pollution degree
wind.	degree of pollution; pollution level

污染程度: 12 phrases in 4 subjects

Automobiles	1
Ecology	2
Technology	8
Water resources	1