stubbornly refusing to change one's opinion or chosen course of action, despite attempts to persuade one to do so
顽固的,固执的;倔强的。
(of an unwelcome phenomenon or situation)very difficult to change or overcome
(不良现象或情况)难改变的;难克服的;根深蒂固的
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the obstinate problem of unemployment .失业这个顽固的难题。
"Middle English: from Latin