星际尘云的英文：
interstellar dust cloud

interstellar是什么意思：
adj. 星际的

They were interested in the heat capacity of interstellar gases.
他们感兴趣的是星际气体的热容量。

Collapsing interstellar cloud reverses its gravitational infall and expands outward into the relatively quiescent interstellar environment
坍缩的星际云克服向内的引力而向外膨胀到较宁静的星际环境中去。

Molecular clouds play an integral role in the prestellar evolutionary sequence of interstellar matter
分子云在星际物质的星前期演化序列中起着不可缺少的作用。

dust是什么意思：
n. 尘土；粉尘
v. 擦灰；掸去；撒

dusted the cookies with sugar;dust crops with fertilizer.
将饼撒上糖粉；把化肥撒在作物上

Dust sugar on to a cake.
将糖撒在糕点上。

The carriage left a trail of dust.
马车后扬起了一缕烟尘。

cloud是什么意思：
n. 云；云状物；阴影；大群；黑斑
v. 使忧郁，暗淡；以云遮敝，乌云密布；使混乱，不清楚；玷污

Cloud the issues.
混淆争端

There was heavy cloud and a lowering cloud base.
阴云密布，而且云层愈来愈低。

cloud over;(of the sky)become covered with clouds
（指天空）布满了云.