flightiness

His reputation for flightiness made the investors hesitant to trust him with the project.

(Chinese) 他那反复无常的名声让投资者犹豫是否要把这个项目托付给他。

The flightiness of the youth often results in short-lived romantic interests.

(Chinese) 年轻人的轻浮往往导致恋情难以长久。