4 sentences

1. 这些废墟是古代文明的残余。

   zhè​xiē fèi​xū shì gǔ​dài wén​míng de cán​yú.

   These ruins are the remains of an ancient civilization.

   Source: Dong Chinese Dictionary

2. 军队正在对残余敌军进行最后的扫荡。

   jūn​duì zhèng​zài duì cán​yú dí​jūn jìn​xíng zuì​hòu de sǎo​dàng.

   The army is conducting a final sweep of the remaining enemy forces.

   Source: Dong Chinese Dictionary

3. 战斗虽然结束了，但城里仍有少量残余的敌军在负隅顽抗。

   zhàn​dòu suī​rán jié​shù le, dàn chéng​lǐ réng yǒu shǎo​liàng cán​yú de dí​jūn zài fù​yú​wán​kàng.

   Though the battle has ended, a small number of remnant enemy forces are still putting up a desperate resistance in the city.

   Source: Dong Chinese Dictionary

4. 战士们迅速解决了残余的敌人。

   zhàn​shì men xùn​sù jiě​jué le cán​yú de dí​rén.

   The soldiers quickly wiped out the remaining enemies.

   Source: Dong Chinese Dictionary