5 sentences

1. 十英里以内没人能接近他。

   shí yīng​lǐ yǐ​nèi méi rén néng jiē​jìn tā.

   No one could get within 10 miles of him.

   Source: OpenSubtitles

2. 每件商品的价格都在五十元以内。

   měi jiàn shāng​pǐn de jià​gé dōu zài wǔ​shí yuán yǐ​nèi.

   The price of each item is within fifty yuan.

   Source: Dong Chinese Dictionary

3. 这种新型声呐设备的声阻抗被精确控制在五十个瑞以内。

   zhè zhǒng xīn​xíng shēng​nà shè​bèi de shēng zǔ​kàng bèi jīng​què kòng​zhì zài wǔ​shí gè ruì yǐ​nèi.

   The acoustic impedance of this new type of sonar equipment is precisely controlled within fifty Rayls.

   Source: Dong Chinese Dictionary

4. 请在三日以内回复邮件。

   qǐng zài sān rì yǐ​nèi huí​fù yóu​jiàn.

   Please reply to the email within three days.

   Source: Dong Chinese Dictionary

5. 我在六英尺以内。

   wǒ zài liù yīng​chǐ yǐ​nèi.

   I am within six feet.

   Source: OpenSubtitles