In 1997, the highest annual averages recorded were 131 micrograms per cubic metre of total suspended particulates and 73 micrograms per cubic metre of respirable suspended particulates.是什么意思_In 1997, the highest annual averages recorded were 131 micrograms per cubic metre of total suspended particulates and 73 micrograms per cubic metre of respirable suspended particulates.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句