So, when there are no more insects to feed to the young spiders, they attach themselves to the mother's leg joints and draw nourishment by sucking the nutrient-rich blood.

所以，当没有更多的昆虫可以喂养小蜘蛛时，它们就会依附在母亲的腿关节上，通过吸食富含营养的血液来吸取营养。