指出了内消旋体消旋原因传统解释的不合理性。
For the reason why optical activity of mesomer is counteracted classical answer was not convincing.
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。
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.
利用内消旋丙交酯在水中水解的速度大于其它丙交酯的特点，用水洗和四次重结晶相结合的提纯方法，获得了高纯的L-丙交酯。
Using the difference of the hydrolysis speed in the water between meso-lactide and other lactides, high pure L-lactide was obtained by water washing-four times recrystallization.
利用内消旋丙交酯在水中水解的速度大于其它丙交酯的特点，用水洗和四次重结晶相结合的提纯方法，获得了高纯的L-丙交酯。
Using the difference of the hydrolysis speed in the water between meso-lactide and other lactides, high pure L-lactide was obtained by water washing-four times recrystallization.
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