8 sentences

1. 将士们日夜守卫着这道雄关。

   jiàng​shì men rì​yè shǒu​wèi zhe zhè dào xióng guān.

   The soldiers guard this formidable pass day and night.

   Source: Dong Chinese Dictionary

2. 战士们日夜在要塞守卫把关。

   zhàn​shì men rì​yè zài yào​sài shǒu​wèi bǎ​guān.

   The soldiers guard the fortress day and night.

   Source: Dong Chinese Dictionary

3. 战士们日夜守卫着祖国的边疆。

   zhàn​shì men rì​yè shǒu​wèi zhe zǔ​guó de biān​jiāng.

   The soldiers guard the country's borders day and night.

   Source: Dong Chinese Dictionary

4. 他日夜操劳，终于完成了这项工程。

   tā rì​yè cāo​láo, zhōng​yú wán​chéng le zhè xiàng gōng​chéng.

   He worked day and night and finally completed this project.

   Source: Dong Chinese Dictionary

5. 战士们日夜坚守在自己的职守上。

   zhàn​shì men rì​yè jiān​shǒu zài zì​jǐ de zhí​shǒu shàng.

   The soldiers remained at their posts day and night.

   Source: Dong Chinese Dictionary

6. 这里的村民们日夜守望，保卫家园。

   zhè​lǐ de cūn​mín men rì​yè shǒu​wàng, bǎo​wèi jiā​yuán.

   The villagers here keep watch day and night to protect their homes.

   Source: Dong Chinese Dictionary

7. 士兵们何戈披甲，日夜守卫着王宫的大门。

   shì​bīng men hé gē pī​jiǎ, rì​yè shǒu​wèi zhe wáng​gōng de dà​mén.

   The soldiers, armed with spears and clad in armor, guarded the palace gates day and night.

   Source: Dong Chinese Dictionary

8. 广大公安干警日夜奋战在维护社会治安的第一线。

   guǎng​dà gōng'ān gàn​jǐng rì​yè fèn​zhàn zài wéi​hù shè​huì zhì'ān de dì​yī​xiàn.

   The vast ranks of public security officers fight day and night on the front lines of maintaining social order.

   Source: Dong Chinese Dictionary