Particularly small dust particles less than 2.5 microns in diameter, can direct access to human pulmonary alveolus, the bacteria into the body.是什么意思_Particularly small dust particles less than 2.5 microns in diameter, can direct access to human pulmonary alveolus, the bacteria into the body.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句