7 sentences

1. 我的下背部受伤了。

   wǒ de xià bèi​bù shòu​shāng le.

   I hurt my lower back.

   Source: OpenSubtitles

2. 她刚做了背部手术。

   tā gāng zuò le bèi​bù shǒu​shù.

   She just had back surgery.

   Source: OpenSubtitles

3. 他的背部感到一阵剧痛。

   tā de bèi​bù gǎn​dào yī zhèn jù​tòng.

   He felt a sharp pain in his back.

   Source: Dong Chinese Dictionary

4. 他感觉到背部有一阵凉意。

   tā gǎn​jué​dào bèi​bù yǒu yī zhèn liáng​yì.

   He felt a chill on his back.

   Source: Dong Chinese Dictionary

5. 收紧背部肌肉。

   shōu​jǐn bèi​bù jī​ròu.

   Tighten your back muscles.

   Source: OpenSubtitles

6. 医生在他背部发现了一个硬质肿块。

   yī​shēng zài tā bèi​bù fā​xiàn le yī gè yìng​zhì zhǒng​kuài.

   The doctor found a hard lump on his back.

   Source: Dong Chinese Dictionary

7. 医生建议他在坐着时挺直腰部，以减轻背部的压力。

   yī​shēng jiàn​yì tā zài zuò zhe shí tǐng​zhí yāo​bù, yǐ jiǎn​qīng bèi​bù de yā​lì.

   The doctor advised him to sit up straight to reduce the pressure on his back.

   Source: Dong Chinese Dictionary