n.衰落；颓废

The decadence of morals is bad for nation. 道德的堕落对于国家是不利的。

But even your dreams will be but a pale shadow of my true decadence. 但你的梦不过是我真实衰落中一个苍白的影子罢了。

It embraced a decadence and an abandon that set it apart from the rest of Egypt. 这里拥抱着某种颓废和狂放，让它有别于埃及的其它地方。