8 sentences

1. 出门在外，要提防小偷。

   chū​mén zài​wài, yào dī fáng xiǎo​tōu.

   When you are away from home, watch out for thieves.

   Source: Dong Chinese Dictionary

2. 这种手机膜可以防刮花。

   zhè zhǒng shǒu​jī mó kě​yǐ fáng guā​huā.

   This phone screen protector can prevent scratches.

   Source: Dong Chinese Dictionary

3. 这件外套是防雨的。

   zhè jiàn wài​tào shì fáng yǔ de.

   This coat is rainproof.

   Source: Tatoeba

4. 古人筑坟以防水患。

   gǔ​rén zhù fén yǐ fáng shuǐ​huàn.

   Ancient people built embankments to prevent floods.

   Source: Dong Chinese Dictionary

5. 人心难测，不可不防。

   rén​xīn nán cè, bù kě bù fáng.

   Human hearts are unpredictable; one must be on guard.

   Source: Dong Chinese Dictionary

6. 这种药水主要是用来防蚊虫的。

   zhè zhǒng yào​shuǐ zhǔ​yào shì yòng​lái fáng wén​chóng de.

   This liquid medicine is mainly used to repel mosquitoes and insects.

   Source: Dong Chinese Dictionary

7. 矿井中必须安装防跑车装置以确保工人的安全。

   kuàng​jǐng zhōng bì​xū ān​zhuāng fáng pǎo​chē zhuāng​zhì yǐ què​bǎo gōng​rén de ān​quán.

   Anti-runaway devices must be installed in mines to ensure worker safety.

   Source: Dong Chinese Dictionary

8. 这座古老的堡垒易守难防。

   zhè zuò gǔ​lǎo de bǎo​lěi yì shǒu nán fáng.

   This ancient fortress is easy to defend but hard to attack.

   Source: Dong Chinese Dictionary