不得已而用之

Explanation: Use: to use. No alternative but to adopt this approach 　　Usage: Partial official; as predicate, object; containing derogatory 　　Source: "Soldiers Road, Wentao Tragic Hero": "deities bugler for the weapon they had to use it." 　　Examples: Weapon and the soldier who, ~. ★ Song Kong Pingzhong, "added Shi said Zhijian"