Grebes have a unique feather-eating behavior, but there are many suspicion and dispute on the mechanism of the digestion process and the function of feathers in the digestive tract.
䴙䴘目鸟类有独特的食羽行为，但对进入消化道后羽毛的功能、消化机理等存疑及争议颇多。
A very high fiber, low protein, and calcium rich diet will ensure good digestive tract function as well as smooth growth.
一个高纤、低蛋白和高钙的食谱能帮助龟只来维持良好的消化功能和维持平均生长。
As a barrier, the normal flora in human intestinal tract protect the host from infection and other diseases and maintain the normal physiological function of human intestine.
像是一道屏障，保护宿主的健康，维持人体肠道正常生理功能。
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