1. The exuvial stage of insect development is an important part of their life cycle.
昆虫发育的蜕皮期是它们生命周期的重要一部分。

2. The exuvial remnants can provide valuable information about the growth and development of the organism.
蜕皮残骸可以提供有关生物体生长和发育的有价值的信息。