2 sentences

1. 你不能一心二用。

   nǐ bù​néng yī​xīn'èr​yòng.

   You can't do two things at once.

   Source: Tatoeba

2. 对书籍的热爱使我们团结一心。

   duì shū​jí de rè'ài shǐ wǒ​men tuán​jié​yī​xīn.

   The love of books unites us.

   Source: CCMatrix