动荡不定

Explanation: Swing: shaking. Swing instability, not stability. Describe the instability, not calm. 　　Source: Tao Ju hidden "History of the reign of the Northern Warlords" Chapter 77: "Department of the army invaded Guangdong, Hunan, Hubei and Hunan in the situation is also volatile." 　　Examples: In ~ the years, he has to maintain this good habit.