There is nothing in this world constant, but inconstancy.

世界上除了多变以外，没有一成不变的东西。

youdao

There is nothing in this world constant, but inconstancy. -jonathan Swift.

除无常外，世间无恒久之事。——乔纳森·斯威夫特。

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The fact that they loved each other was merely proof that the fault lay not in themselves, in their behavior or inconstancy of feeling, but rather in their incompatibility;

他们彼此相爱，这个事实只能证明他们本身没有问题，他们的行为或情感的摇摆也没问题。

youdao