动词
中文翻译：磨练
同义词：
['harden', 'sharpen', 'refine']
例句：
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1. He hasbeen working hard to improve his skills inthe field.
他一直在努力提高他在该领域的技能。
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2. The sword was forged bya master blacksmith.
这把剑是由一位大师铁匠锻造的。
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3. She isknown for her ability to turn challenges intoopportunities.
她以将挑战转化为机会的能力而闻名。