横向
1
Gas essential for breathing
3
Hottest planet in solar system
5
The Red Planet
6
Glass that splits light into spectrum
7
Positive particle in nucleus
纵向
2
Second lightest element
3
Gas form of a liquid
4
Natural satellite of Earth
Gas essential for breathing
Hottest planet in solar system
The Red Planet
Glass that splits light into spectrum
Positive particle in nucleus
Second lightest element
Gas form of a liquid
Natural satellite of Earth