名词
中文翻译：Unknown
同义词：
['sharp', 'keen', 'sharpened']
例句：
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1. The knife was carefully sharpened by the chef.
厨师仔细地磨利了这把刀。
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2. She sharpened her knives with a whetstone.
她用砂轮磨利了她的刀。
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3. The sharp edge of the sword is essential for cutting through tough materials.
剑的锋利边缘对于切割坚韧的材料至关重要。