air monitoring i trument air monitoring instrument air-monitoring device atmospheric monitoring instrument
Related Translations:
大气: 1.(地球周围的气体) atmosphere; air2.(呼吸; 沉重的呼吸) breath; heavy breathing 短语和例子跑得直喘大气 breathe heavily from running; 吓得连大气也不敢出 catch or hold one's breath in fear
