名词
中文翻译：Unknown
同义词：
['iron-willed', 'iron-clad', 'heart of steel']
例句：
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1.He has an iron-willed personality that makes it difficult for him to change his mind.
他有着坚定不移的性格，这使得他很难改变主意。
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2. The captain was iron-clad in his decision not to go on the mission.
船长在决定不执行任务时非常坚定。
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3. Her heart of steel never softens even when faced with adversity.
即使面临困难，她的钢铁般坚强的心也永远不会软化。