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refractory/
rɪˈfræktərɪ
/
1.adjective
难以医治的，顽固的
2.adjective
（对刺激）无反应的，暂时没有反应的
3.adjective
执拗的，难驾驭的，无法掌控的
4.adjective
难熔的，耐热的
5.noun[c]
耐火材料