for a military commander,winning or losing a battle is a common occurrence
勝敗乃兵家常事shènɡ bài nǎi bīnɡ jiā chánɡ shì
勝利和失敗是指揮戰(zhàn)爭(zhēng)的人所經(jīng)常遇到的事。victory and failure are common things among soldiers, Victory and failure are ordinary events in a soldiers career.