横向
1
Our home planet
3
Measure of matter in an object
4
Substance with pH below 7
7
Ball of burning gas in space
8
Substance with pH above 7
9
Smallest unit of an element
纵向
2
Mass per unit volume
5
Amplified beam of light
6
Fourth state of matter
Our home planet
Measure of matter in an object
Substance with pH below 7
Ball of burning gas in space
Substance with pH above 7
Smallest unit of an element
Mass per unit volume
Amplified beam of light
Fourth state of matter