横向
1
Mass per unit volume
5
Unit of electric potential
7
Unit of force
8
The Red Planet
纵向
2
Amplified beam of light
3
Ball of burning gas in space
4
Force that attracts objects together
6
Absolute temperature scale unit
Mass per unit volume
Unit of electric potential
Unit of force
The Red Planet
Amplified beam of light
Ball of burning gas in space
Force that attracts objects together
Absolute temperature scale unit