横向
1
Substance with pH below 7
3
Tectonic landmass section
5
Substance with pH above 7
7
Preserved remains of ancient life
9
Gas essential for breathing
10
Form of thermal energy
纵向
2
Disturbance that transfers energy
4
Measure of matter in an object
6
Path of a planet around the sun
8
Center of an atom or cell