Environmentalists have blamed a winter drought for less vegetation in the northern grasslands resulting in increased risks of dust blowing into Beijing during the dry windy spring. 環(huán)保專(zhuān)家稱(chēng)，去年冬天北方旱情嚴重，草地植被枯干程度較高，地表浮土裸露，遭遇干燥大風(fēng)極易形成揚塵。
The very hot surfaces of steam heating cause a parching effect on the air, often accompanied by a disagreeable odor of burnt dust. 蒸汽表面的高溫在空氣中產(chǎn)生了烘烤的效果，并常常伴隨著(zhù)燃燒的飄塵的令人討厭的氣味。
In this work, samples of airborne particulates,vent gas and smog dust during heating and non-heating seasons were collected in the urban and suburban areas of Lanzhou. 本文收集了蘭州市區和郊區在取暖期和非取暖期的大氣飄塵樣品和汽車(chē)尾氣及煙塵樣品。
