As contraction continues and the density increases, the dust becomes so thick at the center of the cloud that it absorbs the far-infrared radiation. 當收縮過程繼續進行下去,密度不斷增大時,氣塵雲中心的塵埃就會變得極其濃密,因而能夠吸收遠紅外輻射。
The explosion caused a huge black cloud of dust. 火山的爆發造成了一大片黑灰雲。