横向
1
Preserved remains of ancient life
4
Substance with pH above 7
5
Icy body with a tail near the sun
8
Second lightest element
9
Mass per unit volume
10
Gas form of a liquid
纵向
2
Substance with pH below 7
3
Blocking of light by a celestial body
6
Unit of heredity
7
Path of a planet around the sun