横向
1
Fourth state of matter
2
Compound containing oxygen
4
Mass per unit volume
7
The Red Planet
8
Natural satellite of Earth
11
Gas essential for breathing
纵向
1
Positive particle in nucleus
3
Blocking of light by a celestial body
5
Second lightest element
6
Solid with repeating atomic pattern
9
Particle of light
10
Chemical element in table salt