mechanical digestion
noun [ U ] biology specialized uk/məˌkæn.ɪ.kəl daɪˈdʒes.tʃən/ us/məˌkæn.ɪ.kəl daɪˈdʒes.tʃən/
机械消化
the parts of the process of digestion where food is broken up by being bitten and chewed
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