1 sentence

1. 他总是把旧作业本的反面也写满，生活非常节省。

   tā zǒng​shì bǎ jiù zuò​yè​běn de fǎn​miàn yě xiě​mǎn, shēng​huó fēi​cháng jié​shěng.

   He always fills the back of his old notebooks with writing; he leads a very frugal life.

   Source: Dong Chinese Dictionary