艰难曲折

Explanation: Difficulties and _set_backs 　　Usage: Joint type; as object; containing derogatory 　　Source: Mao Zedong's "On the Correct Handling of Contradictions Among the People": "the growth of any new things are to go through difficulties and _set_backs. In the socialist cause, in order not to experience difficulties and _set_backs." Thesaurus:  Pool of sophisticated, have crossed the deep,blue sea, having experienced great changes in the world, have ebb and flow, sup sorrows by the ladleful, Thorn Set way, Hardships, mountains are high,torrents swift Antonym Group:  Go into the society Not deep, with approval of ebb and flow