extremely hard and bitter
Hard work, Chinese idioms, Pinyin is Ji ā NK ǔ Zhu ó Ju é. The struggle is very hard and out of the ordinary. From the biography of Shao Yong in the history of Song Dynasty.
The origin of Idioms
Shao yongzhuan in the history of Song Dynasty: "the beginning is learning, that is to say, it is hard and tough, the cold is not stove, the heat is not fan, and the night is not banquet for several years."
Idiom usage
It's a combination; it's a predicate, an attribute and an adverbial; it's commendatory. After 14 years of arduous Anti Japanese War, the Chinese people finally won the victory.
extremely hard and bitter
bump against things on every side - kē tóu pèng nǎo
Book stall embraces hundreds of cities - tān shū yōng bǎi chéng