基本释义:

三次对称轴

网络释义

1)trigonal axis,三次对称轴

2)three-fold symmetry axis,三次对称轴线

3)threefold symmetry,三次对称

4)diad

['dai?d],二次对称轴

5)hexagonal axis,六次对称轴

6)monogyre,一次对称轴