1·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。
2·The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula.
难熔的内含物中的那种矿物质，也被认为是最早形成的太阳星云凝结的物质。
3·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。
4·As the nebula collapsed because of its gravity, it spun faster and flattened into a disk.
随着由于重力引起的星云坍缩，它旋转得越来越快，并变成了盘状。
5·How big they get depends on their distance from the star and the density and composition of the protoplanetary nebula.
他们的形体能达到多大取决于他们离恒星的距离和原行星星云的组成。