3 sentences

1. 清空你的思绪。

   qīng​kōng nǐ de sī​xù.

   Clear your mind.

   Source: OpenSubtitles

2. 我的思绪很乱，一时理不出头绪。

   wǒ de sī​xù hěn luàn, yī​shí lǐ bù chū tóu​xù.

   My thoughts are a mess; I can't make head or tail of it for the moment.

   Source: Dong Chinese Dictionary

3. 突然的门铃声打断了我的思绪。

   tū​rán de mén​líng​shēng dǎ​duàn le wǒ de sī​xù.

   The sudden sound of the doorbell interrupted my train of thought.

   Source: Dong Chinese Dictionary