2 sentences for 爛 (làn — thoroughly)

1. 那个笑话我都听烂了，没必要再说一遍。

   nà​gè xiào​hua wǒ dōu tīng làn le, méi bì​yào zài shuō yī biàn.

   I've heard that joke so many times; there's no need to tell it again.

   Source: Dong Chinese Dictionary

2. 夏夜的星空群星灿烂，像洒满了碎钻一样。

   xià​yè de xīng​kōng qún​xīng càn làn, xiàng sǎ​mǎn le suì​zuàn yī​yàng.

   The summer night sky was brilliant with stars, as if it were sprinkled with crushed diamonds.

   Source: Dong Chinese Dictionary