rotational contour

例句：

1. 1. The molecule hasa rotational contour that is unique toits structure.
   这个分子有一个独特的旋转轮廓，这是其结构所特有的。
2. 2. The contour ofthe mountain range is defined by its rotational shape.
   山脉的轮廓是由其旋转形状定义的。
3. 3. The rotational contour of theplanets can be used to calculate theirdistances from each other.
   行星的旋转轮廓可以用来计算它们彼此之间的距离。