Extragalactic nebula is invisible to the naked eye.
我们用肉眼是看不河外
的。
Extragalactic nebula is invisible to the naked eye.
我们用肉眼是看不河外
的。
You can see nebulae in the clear summer sky.
在晴朗的夏夜可以看的
云。
A bit of mould is a pleiad of flowers;a nebula is an ant-hill of stars.
一粒霉菌是一簇美不胜收的花朵,一撮云是无数
体的蚁聚。
As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.
当我们的云在自身重力作用下崩溃和更加快速地旋转时,
云中心形成了密集的物质块。这叫做原恒
。
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