横向
1
Path of a planet around the sun
4
Preserved remains of ancient life
5
Center of an atom or cell
8
Reddish electrical conductor
10
Element found in all living things
纵向
2
Natural satellite of Earth
3
Unit of electric potential
6
Curved glass that refracts light
7
Icy body with a tail near the sun
9
Positive particle in nucleus
11
Blocking of light by a celestial body