Some of these fine particles--suspended in air as primary organic aerosols--are tiny flecks rich in carbon, often from sources such as diesel exhaust.是什么意思_Some of these fine particles--suspended in air as primary organic aerosols--are tiny flecks rich in carbon, often from sources such as diesel exhaust.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句