横向
1
Push or pull on an object
3
Basic unit of life
4
Blocking of light by a celestial body
7
Mass per unit volume
8
Measure of matter in an object
9
Unit of force
11
Amplified beam of light
纵向
2
Center of an atom or cell
5
Substance with pH above 7
6
Our home planet
10
Reddish electrical conductor