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关注：1
2013-05-23 12:21
求翻译：A survey conducted by a local non-governmental organization (NGO) in Guangzhou found that nearly 30 percent of 967 college students don’t know what PM2.5 is. Chen decided to monitor PM2.5, fine particulate air pollution which has been in the news lately.是什么意思？ 待解决
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A survey conducted by a local non-governmental organization (NGO) in Guangzhou found that nearly 30 percent of 967 college students don’t know what PM2.5 is. Chen decided to monitor PM2.5, fine particulate air pollution which has been in the news lately.
问题补充： |
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