Clouds of stars and glowing gas, with patches of darkening dust, mark the slow-changing spiral patterns of the Galaxy disk.

点缀着暗淡尘埃的团团恒星和发光星云，标记着银河系缓慢变化的旋涡外形。

youdao

Clouds of stars are glowing gas, with patches of darkening dust, mark the slow-changing spiral patterns of the Galaxy disk.

星云由发光的气体组成，其间夹杂暗色的尘埃。这种明暗相间的组成标示了银河系缓慢的漩涡运动。

youdao

The main mark for the classification of the bag-house is the dust cleaning method.

清灰方法是袋式除尘器分类的主要标志，不同的结构形式适用于各种不同工况的需要。

youdao

But the final resting place where there would be not, if you like,a heavy mark of the person, but rather the person is consigned to dust from where they came."

VOA: standard.2010.07.22