2 sentences

1. 这位艺术家的成就无人不知。

   zhè wèi yì​shù​jiā de chéng​jiù wú rén bù zhī.

   The artist's achievements are known to everyone.

   Source: Dong Chinese Dictionary

2. 这位钢琴家的名声早已响彻寰宇，无人不知。

   zhè wèi gāng​qín​jiā de míng​shēng zǎo yǐ xiǎng​chè huán​yǔ, wú​rén bù zhī.

   This pianist's fame has long resonated throughout the world, and he is known to everyone.

   Source: Dong Chinese Dictionary