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netizen n. 网民
decry v. 公开反对，谴责
smog n. 烟雾
perennial a. 经常出现的，长期的，持久的
mining n. 采矿，矿业
particulate n. 微粒，粒子
PM = particulate matter
Chinese state media and netizens have decried high pollution levels in the northeast city of Shenyang, which activists have said could be the "worst ever" air quality seen in the country.
On Sunday pollution readings were about 50 times higher than that considered safe by the World Health Organization.
State media have blamed the local government for the thick smog.
Pollution is a perennial problem in China&`&s northeast, home to heavy industries including coal mining.
In some parts of Shenyang, Sunday&`&s readings of tiny particulate which can get into the lungs, known as PM 2.5, exceeded 1,400 mg per cubic metre, according to state media People&`&s Daily.
