ash cloud

例句：

1. 1. The ash cloud obscured thesun's rays.
   灰烬云遮蔽了太阳的光线。
2. 2. The ash cloudwas so thick that it blocked out themoonlight.
   灰烬云非常浓密，以至于挡住了月光。
3. 3. Theash cloud driftedslowly across the sky.
   灰烬云缓缓飘过天空。