nebula
n. 星云；角膜云翳
复数 nebulae或nebulas
例句
The size of the nebula at this stage is inversely proportional to its mass.
这个阶段的星云大小与其质量成反比。
《柯林斯英汉双解大词典》
As the nebula collapsed caused by its gravity, it spun faster and flattened into a disk.
当星云因其重力而坍缩时，它旋转得更快，并压扁成一个盘状。
During his sophomore year, he sold his first science-fiction story to a Scottish magazine named Nebula.
在他大二的时候，他把自己的第一个科幻故事卖给了一家名为《星云》的苏格兰杂志。
