横向
1
Gas essential for breathing
4
Push or pull on an object
5
Form of thermal energy
6
Amplified beam of light
8
Unit of force
9
Second lightest element
11
Measure of matter in an object
纵向
2
Nerve cell in the brain
3
Group of similar cells
7
Center of an atom or cell
10
Icy body with a tail near the sun