不要让贪婪导致堕落。

bùyào ràng tānlán dǎozhì duòluò.

Don't let greed lead to moral decay.

他沉迷赌博，越陷越深，最后完全堕落了。

Tā chénmí dǔbó, yuè xiàn yuè shēn, zuìhòu wánquán duòluò le.

He was addicted to gambling, sank deeper and deeper, and in the end completely degenerated.

他曾经很努力，但后来开始堕落，不再学习。

Tā céngjīng hěn nǔlì, dàn hòulái kāishǐ duòluò, bú zài xuéxí.

He used to work hard, but later he started to degenerate and stopped studying.