exopodal shield

例句：

1. 1. The exopod of the crab is a crucial part of its walking mechanism.
   螃蟹的外足是其行走机制的关键部分。
2. 2. The exopodal shield of the octopus is used to protect it from predators.
   章鱼的外足盾用于保护它免受捕食者的伤害。
3. 3. The exopodal shield of the starfish provides protection against predators and helps it to swim efficiently.
   星鱼的外足盾提供了保护，帮助它有效地游泳。