4 sentences

1. 气温低于零度。

   qì​wēn dī​yú líng dù.

   The temperature is below freezing.

   Source: Dong Chinese Dictionary

2. 这里的房子通常以低于市价的价格出售。

   zhè​lǐ de fáng​zi tōng​cháng yǐ dī​yú shì​jià de jià​gé chū​shòu.

   Houses here are usually sold at below-market prices.

   Source: Dong Chinese Dictionary

3. 医生的报告显示，他的红细胞计数略低于正常值。

   yī​shēng de bào​gào xiǎn​shì, tā de hóng​xì​bāo jì​shù lüè dī​yú zhèng​cháng​zhí.

   The doctor's report shows that his red blood cell count is slightly below the normal range.

   Source: Dong Chinese Dictionary

4. 如果账户资金低于维持保证金，你将收到追缴通知。

   rú​guǒ zhàng​hù zī​jīn dī​yú wéi​chí bǎo​zhèng​jīn, nǐ jiāng shōu​dào zhuī​jiǎo tōng​zhī.

   If the account funds fall below the maintenance margin, you will receive a margin call.

   Source: Dong Chinese Dictionary