它们的旋光方向和旋光度大小都是由其分子的立体结构所决定。
Their rotatory direction and optical rotation are determined by the molecular stereostructure.
它们的旋光方向和旋光度大小都是由分子的立体结构所决定的。
Their rotatory direction and optical rotation are both determined by the molecular stereostructure.
四咪唑分子具有光学活性，为了确定旋光度的大小和方向，使用传统方法既耗时又不经济。
The tetramisole molecular have optical activity. The traditional method is time and cost consuming to decide the rotatory direction and the value of optical rotatory.
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