横向
1
Disturbance that transfers energy
4
Gas essential for breathing
5
Unit of electric potential
7
The Red Planet
8
Center of an atom or cell
纵向
2
Curved glass that refracts light
3
Unit of force
6
Group of similar cells
Disturbance that transfers energy
Gas essential for breathing
Unit of electric potential
The Red Planet
Center of an atom or cell
Curved glass that refracts light
Unit of force
Group of similar cells