allotropicity

例句：

1. 1. The allotropic nature of the element is a key factor in its behavior.
   该元素的同素异形体性质是其行为的关键因素。
2. 2.Polymorphism is a fascinating topic that has been studied for decades.
   同素异形体是一个引人入胜的主题，几十年来一直备受关注。
3. 3.The study of polymorphism can provide valuable insights into the evolution of life on Earth.
   研究同素异形体可以为了解地球上生命演化提供宝贵的见解。