n. 变化无常, 变迁, 荣枯, 盛衰

Vicissitude \Vi*cis"si*tude\, n. [L. vicissitudo, fr. vicis
change, turn: cf. F. vicissitude. See {Vicarious}.]
1. Regular change or succession from one thing to another;
alternation; mutual succession; interchange.

God made two great lights . . .
To illuminate the earth and rule the day
In their vicissitude, and rule the night. --Milton.

2. Irregular change; revolution; mutation.

This man had, after many vicissitudes of fortune,
sunk at last into abject and hopeless poverty.
--Macaulay.