2 sentences

1. 马克思和恩格斯被公认为伟大的革命导师。

   Mǎ​kè​sī hé ēn​gé​sī bèi gōng​rèn wéi wěi​dà de gé​mìng dǎo​shī.

   Marx and Engels are recognized as great revolutionary mentors.

   Source: Dong Chinese Dictionary

2. 马克思和恩格斯共同创立了科学社会主义。

   Mǎ​kè​sī hé ēn​gé​sī gòng​tóng chuàng​lì le kē​xué shè​huì​zhǔ​yì.

   Marx and Engels co-founded scientific socialism.

   Source: Dong Chinese Dictionary