invertebral

例句：

1. 1.The invertebrate is a type of animal that lacks limbs and has a segmented body.
   无脊椎动物是一种没有四肢且身体分节的动物。
2. 2.Invertebrates are an important part of the ecosystem, providing food for many other organisms.
   无脊椎动物是生态系统的重要组成部分，为许多其他生物提供食物。
3. 3.Many insects are invertebrates, such as spiders and beetles.
   许多昆虫是无脊椎动物，例如蜘蛛和甲虫。