to sharpen one's knife
敌人磨刀霍霍，妄图侵犯我国，我们务必保持警惕。
The enemy are rattling their sabres in a vain attempt to invade our country. We must remain vigilant.
汉译英翻译词典收录86165条汉英翻译词条，基本涵盖了全部常用中文字词的英语拼写、翻译、音标、读音、用法、例句等，是英语学习的有利工具。