On the basis of helix theory, the rotatory direction can be predicted precisely and the optical rotation can be calculated, too.
利用螺旋理论的规律可以准确预测其旋光方向，也可以计算其旋光度。
In the light of the helix theory, aromatic annulenes and non-aromatic annulcncs are all the mixture of the mesomer and raceme, so they haven't opticity activeity.
从螺旋理论看，芳香轮烯和非芳香轮烯都是内消旋体和外消旋体的混合物，故都不呈现旋光性。
The rotation direction of molecules can be deduced by using the helix theory Conversely, the configuration of molecules can also be deduced from rotation direction.
利用螺旋理论的规律可以推断分子的旋光方向，反之，从旋光方向也可以推断分子的构型和构象。
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