气泡膜保护外壳。非常不错还会再次购买除了这个外壳表面太光滑了，我担心它会很容易掉下来####[['不错', 'Overall#Overall', 'positive'], ['外壳表面', 'Appearance Design#Grip Feeling', 'negative'], ['气泡膜', 'Product Packaging#Packaging Materials', 'neutral'], ['再次购买', 'Buyer Attitude#Repurchase and Churn Tendency', 'positive']]