can 't be held back
It's a Chinese idiom. Its pinyin is Ru ì B ù K ě D ā ng, which means it's extremely sharp and unstoppable. It's used to describe the ferocious and unstoppable. It comes from the biography of Wu and Han in the later Han Dynasty.
The origin of Idioms
"Wu Han Zhuan" in the book of the later Han Dynasty: "it is too sharp."
Idiom usage
As predicate, object, attribute, adverbial; with commendatory example that is ~, invincible. The eighth chapter of Ouyang mountain's sanjiaxiang
Idiom story
During the Five Dynasties, shortly after Guo Wei, the Taizu of Zhou Dynasty, ascended the throne, Liu Min, the Hedong Jiedu envoy of the later Han Dynasty, led the army to attack Jinzhou. Zhou Taizu sent Chang Sheng General Wang Jun to rescue. After Wang Jun arrived in Shanzhou, he stationed his troops to rest. Taizu sent Zhai shousu to urge the expedition. Wang Jun explained that in order to avoid a head-on conflict with Liu Min's army, Liu Min withdrew at a loss.
can 't be held back
be utterly devoid of conscience - sàng jìn tiān liáng
desist from military activities and encourage culture and education - yǎn wǔ dí wén
so far behind that one can only see the dust of the rider ahead - wàng chén mò jí
The wolf and the sheep feed together - láng yáng tóng sì