横向
1
Disturbance that transfers energy
4
Particle of light
5
Icy body with a tail near the sun
纵向
2
Our home planet
3
Gas essential for breathing
6
Path of a planet around the sun
7
Unit of electric potential
8
Curved glass that refracts light
Disturbance that transfers energy
Particle of light
Icy body with a tail near the sun
Our home planet
Gas essential for breathing
Path of a planet around the sun
Unit of electric potential
Curved glass that refracts light