兴衰的英文：
to rise and decline

参考例句：

It deals with the important matter of the rise and fall, life or death of mankind.
这是事关人类兴衰存亡的大事。

I am reading a book about the rise and fall of the Roman Empire
我正在看一本关于罗马帝国兴衰的书

rise是什么意思：
n. 上升，升起；出现，兴起；增加；增长；高地
v. 上升；增强，增加；起立；起床；高耸；使…飞起；使…浮上水面；复活；发酵

to erect; to rise
竖立

Prices are on the rise.
价格在上涨。

To rise with the crow of cocks—assiduity and early rising
鸡鸣而起

I prefer low rise to high rise.
我宁可选择矮房也不要高楼。

Rise from the ashes
从毁灭中再生

decline是什么意思：
n. 下降；减少，衰退，衰落，最后部分；晚年，倾斜
v. 下降，下跌；减少；倾斜；婉拒；使降低，使变格

sink into a decline
开始衰落，衰弱下去，体力衰退

The population is on the decline.
人口在减少。

The decline of literature indicates the decline of a nation.
文学的衰落表明一个民族的衰落。

Tax cheats have declined.
偷税逃税事件已有所减少。

to refuse with thanks; to politely decline
婉谢