spinigrade

例句：

1. 1.The spider is a spinigrade insect.
   蜘蛛是一种有足的昆虫。
2. 2. The spider has eight legs, which are spinigrade.
   蜘蛛有八条腿，每条腿都是有足的。
3. 3. The spider's web is spun from its own silk, which is spinigrade.
   蜘蛛的网是由它的丝制成的，这种丝是无节的。