2 sentences

1. 给自己点时间去思考和沉思。

   gěi zì​jǐ diǎn shí​jiān qù sī​kǎo hé chén​sī.

   Give yourself some time to think and reflect.

   Source: CCMatrix

2. 这个老人凝神沉思，没有听见我们进来。

   zhè​ge lǎo​rén níng​shén chén​sī, méi​yǒu tīng jiàn wǒ​men jìn lai.

   The old man was lost in thought and did not hear us come in.

   Source: UM-Corpus: Spoken