The great nebula is a cloud of glowing gas centered on four hot, blue stars located about 1, 500 light-years from the earth . 这个大星云是以离地球大约1500光年的四颗很热的蓝星为中心的发光气体云。
He presently landed on top of the unexploded boilers, forty feet below the former pilothouse, accompanied by his wheels and a rain of other stuff, and enveloped in a cloud of scalding steam . 他随即就降落在原来的驾驶台下面四十英尺的那些未爆炸的锅炉顶上，被一片滚烫的蒸汽团团围住，随着他一同纷纷落下的还有他的舱轮和一些别的东西。
A cloud of smoke formed over the burning city 燃烧的城市上空形成一片烟云。
The explosion will raise a cloud of radioactive dust 爆炸会伸起一片放射性尘埃蘑菇云
It is like a cloud of images held together 像一片云状的印象连在一起。
The car swept past in a cloud of dust 汽车飞快开过，扬起一片尘土。
The cars set off in a cloud of dust 那些汽车在滚滚尘埃中启动了。
A cloud of suspicion is hanging over him 有一团疑云笼罩著他
The chimney emitted a cloud of smoke 烟囱里冒出一股烟雾。
We used this door when a ghost came on in a cloud of smoke （我们使用这个门，当鬼魂出现在一大片烟雾中。 ）
