横向
1
Ball of burning gas in space
3
Second lightest element
5
Fourth state of matter
8
Mass per unit volume
纵向
2
Molten rock beneath Earth surface
4
Amplified beam of light
6
Preserved remains of ancient life
7
Center of an atom or cell
Ball of burning gas in space
Second lightest element
Fourth state of matter
Mass per unit volume
Molten rock beneath Earth surface
Amplified beam of light
Preserved remains of ancient life
Center of an atom or cell