横向
1
Preserved remains of ancient life
4
Nerve cell in the brain
5
Disturbance that transfers energy
8
Natural satellite of Earth
11
Gas essential for breathing
纵向
2
Blocking of light by a celestial body
3
Mass per unit volume
6
Magnetic metallic element
7
Unit of force
9
Center of an atom or cell
10
Tectonic landmass section