减
jiǎn
to lower, to decrease, to reduce, to subtract, to diminish
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减少污染很重要
jiǎn shǎo wū rǎn hěn zhòng yào
Reducing pollution is important
他减少了工作时间
tā jiǎn shǎo le gōng zuò shí jiān
He reduced his working hours
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.