横向
1
Positive particle in nucleus
5
Group of similar cells
6
Basic unit of life
7
Substance with pH above 7
纵向
2
Center of an atom or cell
3
Push or pull on an object
4
Particle of light
8
Unit of electric potential
Positive particle in nucleus
Group of similar cells
Basic unit of life
Substance with pH above 7
Center of an atom or cell
Push or pull on an object
Particle of light
Unit of electric potential