Thirdly, a local university is developing a unique type of particulate filter to reduce pollution which can be retrofitted at low costs to vehicles in service.是什么意思_Thirdly, a local university is developing a unique type of particulate filter to reduce pollution which can be retrofitted at low costs to vehicles in service.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句