请缨: [书面语] request a cord from the emperor (to bind the enemy) -- submit a request for a military assignment 短语和例子请缨杀敌 request to be sent to the front; volunteer for battle
请缨讨逆: offer service in the army and suppress the rebels
杀敌: fight the enemy; engage in battle 短语和例子英勇杀敌 be brave in battle; fight heroically; 苦练杀敌本领 practise hard to master combat skills
