transform ing the physical connection representation into the mathematical calculation representation

13C NMR representation

2’complement representation

2-adjacency representation

2D graph representation

2-tuple linguistic representation

2-tuple linguistic representation model

3-D graphical representation

3D object representation

3-D representation

3-generation reproduction testing

4D graphical representation

6-D representation

a reproduction crowd of Ciconia nigra

Ability of reproduction

abnormal reproduction

absolute representation

absolutely irreducible representation

abstract representation

accident reproduction