横向
1
Preserved remains of ancient life
2
Positive particle in nucleus
4
Our home planet
5
Substance with pH below 7
6
Basic unit of life
纵向
2
Fourth state of matter
3
Tectonic landmass section
7
Precious yellow metallic element
Preserved remains of ancient life
Positive particle in nucleus
Our home planet
Substance with pH below 7
Basic unit of life
Fourth state of matter
Tectonic landmass section
Precious yellow metallic element