3 sentences

1. 牧民在每头小牛身上都打上了所属牧场的烙印。

   mù​mín zài měi tóu xiǎo niú shēn shàng dōu dǎ shàng le suǒ​shǔ mù​chǎng de lào​yìn.

   The herders branded every calf with the mark of their ranch.

   Source: Dong Chinese Dictionary

2. 童年的贫困经历在他的人格中留下了深刻的烙印。

   tóng​nián de pín​kùn jīng​lì zài tā de rén​gé zhōng liú​xià le shēn​kè de lào​yìn.

   His childhood experience of poverty left a deep imprint on his personality.

   Source: Dong Chinese Dictionary

3. 在当时，进过监狱的人会被社会打上难以磨灭的烙印。

   zài dāng​shí, jìn guo jiān​yù de rén huì bèi shè​huì dǎ shàng nán​yǐ mó​miè de lào​yìn.

   At that time, people who had been to prison were permanently stigmatized by society.

   Source: Dong Chinese Dictionary