10 sentences

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

7. 以防你突然自然死亡。

   yǐ​fáng nǐ tū​rán zì​rán sǐ​wáng.

   In case you suddenly die of natural causes.

   Source: OpenSubtitles

8. 最好带件外套，以防天气变冷。

   zuì hǎo dài jiàn wài​tào, yǐ​fáng tiān​qì biàn lěng.

   You'd better bring a jacket in case the weather gets cold.

   Source: Dong Chinese Dictionary

9. 不，你得发誓，以防我到时不在场。

   bù, nǐ děi fā​shì, yǐ​fáng wǒ dào​shí bù zài​chǎng.

   No, you've got to swear it, in case I'm not here.

   Source: OpenSubtitles

10. 我们要做好准备，以防万一发生不测。

    wǒ​men yào zuò hǎo zhǔn​bèi, yǐ​fáng wàn​yī fā​shēng bù​cè.

    We must be well-prepared in case of any unforeseen circumstances.

    Source: Dong Chinese Dictionary