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减少污染很重要
jiǎn shǎo wū rǎn hěn zhòng yào
Reducing pollution is important
工业污染是个大问题
gōng yè wū rǎn shì gè dà wèn tí
Industrial pollution is a big problem.
政府要减少空气污染。
zhèng fǔ yào jiǎn shǎo kōng qì wū rǎn。
The government wants to reduce air pollution.