bipinnate

例句：

1. 1. The bipinnate structure of the plant is responsible for its ability to survive in harsh environments.
   这种植物的双重结构使其能够在恶劣的环境中生存。
2. 2. In biology, bipinnate refers to a type of chromosome that has two copies of each gene.
   在生物学中，双染色体指的是每对基因都有两个副本的染色体类型。
3. 3.The bipinnate algae found in the ocean are known for their unique adaptations to life underwater.
   海洋中的双叶藻因其独特的水下适应能力而闻名。