Chitin is an important polysaccharide that occurs in the exoskeleton and gut linings of insects, and it was degraded by chitinase at appropriate time for the proper development stage of the organism.

几丁质是昆虫外壳和围食膜的重要组成成分，在适当的时期昆虫分泌适量的几丁质酶降解几丁质以保证昆虫的正常生长。

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Chitin is an important polysaccharide that occurs in the exoskeleton and gut linings of insects, and it was degraded by chitinase at appropriate time for the proper development stage of the organism.

几丁质是昆虫外壳和围食膜的重要组成成分，在适当的时期昆虫分泌适量的几丁质酶降解几丁质以保证昆虫的正常生长。

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