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n.防腐剂;预防法;防护层;adj.防腐的,(能)保存的;储藏的;有保护力的; 变形: 复数:preservatives 英英释义: preservative[ pri'zə:vətiv ]n.a chemical compound that is added to protect against decay or decompositionadj.tending or having the power to preserve"the timbers should be treated with a pr