常見例句雙語例句These levels of indoor air pollutants may be of particular concern because most people spend about 90％ of their time indoors.由於多數(shù)人大約90％的時間都在室內(nèi)度過，室內(nèi)空氣汙染的這種程度應儅引起人們的特別關(guān)注。 返回 indoors air pollutants