世风日下的英文：
The moral degeneration of the world is getting worse day by day.

moral是什么意思：
adj. 道德上的；讲道德的；道义上的
n. 道德；品行；风纪；寓意

This is a moral issue.
这是一个道德问题。

He is wrong by moral standards.
按道德规范，他错了。

a high moral standard
很高的道德水准

degeneration是什么意思：
n. 退化,恶化,堕落

"degenerative:Of, relating to, causing, or characterized by degeneration"

Asteroid hyalosis is a degenerative condition of the eye.
星状玻璃体症是一种眼部退行性疾病。

A translucent product of some degenerative skin conditions.
透明角质皮肤衰退时分泌的一种半透明产物

world是什么意思：
n. 世界；宇宙；领域；世人；人世；天体，星球

This may be normal in the physical world, but there is no reason for it in the world of software.
在物理世界这是正常的，但没有理由在软件世界也这样。

They wanted to revolutionize the whole world.
他们要在全世界发动革命。

That are inexorably shaping the world of tomorrow.
这将无情地影响明日的世界。