横向
1
Biological catalyst
3
Infectious microscopic agent
6
Blocking of light by a celestial body
8
Curved glass that refracts light
9
Unit of force
10
Chemical element in table salt
12
Smallest unit of an element
纵向
2
Group of similar cells
4
Measure of matter in an object
5
Unit of heredity
7
Preserved remains of ancient life
11
Magnetic metallic element