横向
1
Chemical element in table salt
3
Center of an atom or cell
4
Naturally occurring inorganic solid
5
Unit of energy
9
Ball of burning gas in space
纵向
2
Smallest unit of an element
3
Nerve cell in the brain
6
Preserved remains of ancient life
7
Curved glass that refracts light
8
Group of similar cells
10
Path of a planet around the sun