横向
1
Unit of electric potential
3
Second lightest element
7
Icy body with a tail near the sun
9
Amplified beam of light
10
Glass that splits light into spectrum
11
Infectious microscopic agent
纵向
2
Path of a planet around the sun
4
Mass per unit volume
5
Curved glass that refracts light
6
The Red Planet
8
Natural satellite of Earth
11
Gas form of a liquid
12
Blocking of light by a celestial body