横向
1
Second lightest element
4
Ball of burning gas in space
5
Unit of power
6
Magnetic metallic element
9
Disturbance that transfers energy
纵向
2
Infectious microscopic agent
3
Unit of force
7
Our home planet
8
Smallest unit of an element
Second lightest element
Ball of burning gas in space
Unit of power
Magnetic metallic element
Disturbance that transfers energy
Infectious microscopic agent
Unit of force
Our home planet
Smallest unit of an element