2 sentences

1. 这些是主合同的附属协议。

   zhè​xiē shì zhǔ hé​tong de fù​shǔ xié​yì.

   These are supplementary agreements to the main contract.

   Source: Dong Chinese Dictionary

2. 他的孩子在大学附属小学读书。

   tā de hái​zi zài dà​xué fù​shǔ xiǎo​xué dú​shū.

   His child attends the elementary school affiliated with the university.

   Source: Dong Chinese Dictionary