横向
1
Center of an atom or cell
4
Unit of electric potential
5
Infectious microscopic agent
9
Tectonic landmass section
10
Smallest unit of an element
纵向
2
Ball of burning gas in space
3
Icy body with a tail near the sun
6
Natural satellite of Earth
7
Group of similar cells
8
Magnetic metallic element
11
Unit of energy