横向
1
Our home planet
3
Basic unit of life
5
Nerve cell in the brain
7
Particle of light
纵向
2
Gas essential for breathing
3
Element found in all living things
4
Form of thermal energy
6
Curved glass that refracts light
Our home planet
Basic unit of life
Nerve cell in the brain
Particle of light
Gas essential for breathing
Element found in all living things
Form of thermal energy
Curved glass that refracts light