gaseous emission nebula

例句：

1. 1. The study of this gaseous emission nebula is crucial for understanding the origins of life on other planets.
   研究这种气体排放星云对于理解其他行星上生命的起源至关重要。
2. 2.Astronomers have discovered several gaseous emission nebulae in our galaxy.
   天文学家在我们的星系中发现了好几个气体排放星云。
3. 3.The gaseous emission nebula is a fascinating object that has captured the attention of scientists and astronomers for decades.
   这个气体排放星云是一个令人着迷的天体，几十年来一直吸引了科学家和天文学家的注意。