10 sentences

1. 他不慎从马背上跌落。

   tā bù​shèn cóng mǎ​bèi shàng diē​luò.

   He accidentally fell off his horse.

   Source: Dong Chinese Dictionary

2. 兹事体大，不可不慎。

   zī shì​tǐ dà, bù kě bù​shèn.

   This is a matter of great importance and must be handled with caution.

   Source: Dong Chinese Dictionary

3. 他因为言语不慎冲撞了老板。

   tā yīn​wèi yán​yǔ bù​shèn chōng​zhuàng le lǎo​bǎn.

   He offended his boss with some careless remarks.

   Source: Dong Chinese Dictionary

4. 他不慎打碎了手中的玻璃杯。

   tā bù​shèn dǎ​suì le shǒu zhōng de bō​li​bēi.

   He accidentally broke the glass in his hand.

   Source: Dong Chinese Dictionary

5. 船只在浓雾中不慎触碰到了暗礁。

   chuán​zhī zài nóng​wù zhōng bù​shèn chù​pèng dào le àn​jiāo.

   The ship accidentally hit a submerged reef in the thick fog.

   Source: Dong Chinese Dictionary

6. 他因为交友不慎，染了一身坏毛病。

   tā yīn​wèi jiāo​yǒu bù​shèn, rǎn le yī shēn huài máo​bìng.

   Because of his poor choice of friends, he picked up a lot of bad habits.

   Source: Dong Chinese Dictionary

7. 他在登山时由于路滑而不慎失足。

   tā zài dēng​shān shí yóu​yú lù huá ér bù​shèn shī​zú.

   He accidentally slipped while climbing the mountain.

   Source: Dong Chinese Dictionary

8. 他不慎从陡峭的山崖上堕入深谷。

   tā bù​shèn cóng dǒu​qiào de shān​yá shàng duò rù shēn​gǔ.

   He accidentally fell from a steep cliff into a deep valley.

   Source: Dong Chinese Dictionary

9. 由于向导的出卖，他们不慎落入了敌人的埋伏。

   yóu​yú xiàng​dǎo de chū​mài, tā​men bù​shèn luò​rù le dí​rén de mái​fú.

   Due to the guide's betrayal, they accidentally fell into an enemy ambush.

   Source: Dong Chinese Dictionary

10. 那些攀岩者如果不慎从高处坠落，就会粉身碎骨。

    nà​xiē pān​yán​zhě rú​guǒ bù​shèn cóng gāo​chù zhuì​luò, jiù huì fěn​shēn​suì​gǔ.

    If those climbers accidentally fall from a height, they will be dashed to pieces.

    Source: Dong Chinese Dictionary