横向
1
Substance with pH below 7
4
Unit of energy
6
Chemical element in table salt
8
Our home planet
9
Positive particle in nucleus
纵向
2
Icy body with a tail near the sun
3
Mass per unit volume
5
Particle of light
7
Molten rock beneath Earth surface
Substance with pH below 7
Unit of energy
Chemical element in table salt
Our home planet
Positive particle in nucleus
Icy body with a tail near the sun
Mass per unit volume
Particle of light
Molten rock beneath Earth surface