dicyclic crinoid

例句：

1. 1. The dicyclic structure of the plant is essential for its survival.
   这种植物的二重对称结构对其生存至关重要。
2. 2. The dicyclic nature of the problem makes it difficult to solve.
   这个问题的二重对称性质使得解决起来很困难。
3. 3. The dicyclic arrangement of the molecules in the crystal lattice is responsible for its unique properties.
   晶体晶格中分子的二重对称排列是其独特性质的来源。