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Cs. Cell differentiation and proliferation of bone tissue engineering can be promoted with the use of sodium alginate and collagen interpenetrating network hydrogel, and the appropriate ratio of sodium alginate and collagen is 21.Bats are the second-most speciose group of mammals, comprising 20% of species diversity today. Their global explosion, representing one of the greatest adaptive radiations in mammalian history, is largely attributed to their ability of laryngeal echolocation and powered flight, which enabled them to conquer the ni
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