横向
1
Preserved remains of ancient life
3
Biological catalyst
6
Unit of energy
7
Our home planet
纵向
2
Second lightest element
4
Chemical element in table salt
5
Form of thermal energy
8
Unit of electric potential
Preserved remains of ancient life
Biological catalyst
Unit of energy
Our home planet
Second lightest element
Chemical element in table salt
Form of thermal energy
Unit of electric potential