形容词
中文翻译：硬的
同义词：
['tough', 'stout', 'robust', 'toughened', 'hardened例句：1. The knife is very hard and sharp.（这把刀非常硬且锋利。）']
例句：
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1. The knife is very hard and sharp.
这把刀非常硬且锋利。
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2.The steel is hard and sharp enough to cut through anything.
这钢足够硬且锋利，可以切割任何东西。
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3. The car was hard and sharp, but it still broke easily.
这车很硬且锋利，但仍然容易损坏。