pointed and sharp; acute 尖锐
headlong start often ends in hasty retreat 其进锐者其退速
conserve strength and store up energy; build up one's strength 养精蓄锐
wear armour and carry weapons 披坚执锐
Rui Guan 锐管
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)