名词中文翻译
中文翻译：日本武士刀
同义词：
['samurai sword', 'samurai blade', 'samurai weapon']
例句：
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1. The katana was a symbol of the samurai's honor and courage.
那把刀是武士荣誉和勇气的象征。
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2. He had been trained in the art of using a katana since he was a child.
他从小时候起就接受了使用日本刀的艺术训练。
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3. In ancient times, the katana was often used as a weapon for battle.
在古代，日本刀常常被用作战斗武器。