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CET-4 CET-6 考研 TOEFL IELTS BNC: 2193 COCA: 2523
protein
pro·tein / 5protin ; 5prEJti:n /noun C,U
1. one of several natural substances that exist in food such as meat, eggs, and beans, and which your body needs in order to grow and remain strong and healthy蛋白质

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