6 sentences for 以防 (yǐ​fáng — prevent)

1. 古人常在夏天曝书以防虫蛀。

   gǔ​rén cháng zài xià​tiān pù shū yǐ​fáng chóng​zhù.

   The ancients often sun-dried books in the summer to prevent insect damage.

   Source: Dong Chinese Dictionary

2. 农民们正在茨房顶，以防漏雨。

   nóng​mín men zhèng​zài cí fáng​dǐng, yǐ​fáng lòu​yǔ.

   The farmers are thatching the roof to prevent leaks.

   Source: Dong Chinese Dictionary

3. 修理电路时务必小心，以防触电。

   xiū​lǐ diàn​lù shí wù​bì xiǎo​xīn, yǐ​fáng chù​diàn.

   Be careful when repairing the circuit to avoid electric shock.

   Source: Dong Chinese Dictionary

4. 他在窗户上装了铁栏杆，以防小偷进来。

   tā zài chuāng​hu shàng zhuāng le tiě lán​gān, yǐ​fáng xiǎo​tōu jìn​lái.

   He installed iron bars on the windows to prevent thieves from entering.

   Source: Dong Chinese Dictionary

5. 我们需要定期备份资料库以防数据丢失。

   wǒ​men xū​yào dìng​qī bèi​fèn zī​liào​kù yǐ​fáng shù​jù diū​shī.

   We need to back up the database regularly to prevent data loss.

   Source: Dong Chinese Dictionary

6. 古代军队在营地周围布置了鹿角以防偷袭。

   gǔ​dài jūn​duì zài yíng​dì zhōu​wéi bù​zhì le lù​jiǎo yǐ​fáng tōu​xí.

   Ancient armies set up abatis (deer horns) around their camps to prevent sneak attacks.

   Source: Dong Chinese Dictionary