Definition: a mass of something such as dust or smoke that looks like a cloud Level: B2
拆除现场升起的一团厚厚灰尘覆盖了整个区域。
A thick ___cloud of dust from the demolition site covered the entire area.
工厂排放出一团浓密的烟雾，危害环境。
The factory emits a dense ___cloud of smoke that harms the environment.
爆炸后，一团巨大的碎片云充满了空气。
After the explosion, a giant ___cloud of debris filled the air.
