横向
1
Unit of force
4
Ball of burning gas in space
5
Amplified beam of light
6
Particle of light
8
Substance with pH below 7
9
Gas essential for breathing
10
Preserved remains of ancient life
纵向
1
Nerve cell in the brain
2
Smallest unit of an element
3
Group of similar cells
6
Positive particle in nucleus
7
Reddish electrical conductor
11
Precious yellow metallic element