Victory or defeat is a matter of military affairs
Victory or defeat is something that often happens to those who lead the troops. Don't take a chance victory or defeat too seriously. That is to say, it doesn't matter if you fail once. As long as you draw lessons and sum up experience, you will succeed!
source
1. "A victory and a defeat is a constant trend of military strategists," said Pei Du Zhuan, an old book of Tang Dynasty (Note: Shi: Tongjia word, Tongshi, thing, thing.) (2) Chapter 71 of the romance of the Three Kingdoms by Luo Guanzhong in Ming Dynasty: "Cao said:" it's not the sin of Ying, but the victory and defeat are the common affairs of soldiers and families. " 3. The palace of eternal life · bribery power by Hong Sheng in Qing Dynasty: I think the victory or defeat is a matter of military affairs, and I can be excused for the occasional defeat.
Examples
If this experiment fails, don't lose heart. If you sum up experience and persist in the experiment, you will surely succeed.
Victory or defeat is a matter of military affairs
a few dogs are barking and some cocks crowing - jī míng gǒu fèi
snatch a victory out of defeat - zhuǎn bài wéi shèng
To teach others in various ways - xíng shū sè shòu
feel irreconcilable hatred for sb - bù gòng dài tiān