1、On the other hand, inconstancy often results in failure.
反之，缺乏恒心常常導致失敗。

2、Inconstancy is the cause of disaster, which results in separation and death.
無常意味著災難，它所導致的結(jié)果就是生離死別。

3、The article discuss the historic continuity and inconstancy of music from esthetic viewpoint.
本文從音樂審美功能角度論述音樂的歷史延續(xù)性和易變性。

inconstancy翻譯