11 sentences

1. 活塞在气缸内上下移动。

   huó​sāi zài qì​gāng nèi shàng​xià yí​dòng.

   The piston moves up and down inside the cylinder.

   Source: Dong Chinese Dictionary

2. 上下楼梯时请握紧扶手。

   shàng​xià lóu​tī shí qǐng wò​jǐn fú​shǒu.

   Please hold the handrail firmly when going up and down the stairs.

   Source: Dong Chinese Dictionary

3. 他上下打量着那个陌生人。

   tā shàng​xià dǎ​liang zhe nà​gè mò​shēng​rén.

   He sized up the stranger from head to toe.

   Source: Dong Chinese Dictionary

4. 他上下打量着眼前的这栋建筑。

   tā shàng​xià dǎ​liang zhe yǎn​qián de zhè dòng jiàn​zhù.

   He sized up the building in front of him from top to bottom.

   Source: Dong Chinese Dictionary

5. 他浑身上下会有一种针扎般的灼烧感。

   tā hún​shēn shàng​xià huì yǒu yī zhǒng zhēn zhā bān de zhuó​shāo​gǎn.

   He'd have a burning sensation like pins and needles all over his body.

   Source: OpenSubtitles

6. 他看起来有五十岁上下。

   tā kàn​qǐ​lai yǒu wǔ​shí suì shàng​xià.

   He looks to be around fifty years old.

   Source: Dong Chinese Dictionary

7. 这位老师的年纪在四十岁上下。

   zhè wèi lǎo​shī de nián​jì zài sì​shí suì shàng​xià.

   This teacher is around forty years old.

   Source: Dong Chinese Dictionary

8. 全国上下正众志成城地抗击疫情。

   quán guó shàng​xià zhèng zhòng​zhì​chéng​chéng de kàng​jī yì​qíng.

   The whole country is united in fighting the pandemic.

   Source: Dong Chinese Dictionary

9. 全厂上下都在为完成任务而努力。

   quán chǎng shàng​xià dōu zài wèi wán​chéng rèn​wu ér nǔ​lì.

   Everyone in the factory, from top to bottom, is working hard to complete the task.

   Source: Dong Chinese Dictionary

10. 这本诗集分为上下两辑出版。

    zhè běn shī​jí fēn​wéi shàng​xià liǎng jí chū​bǎn.

    This collection of poems was published in two volumes.

    Source: Dong Chinese Dictionary

11. 这两位拳击手的水平在上下之间，谁赢都不会让人意外。

    zhè liǎng wèi quán​jī​shǒu de shuǐ​píng zài shàng​xià zhī​jiān, shéi yíng dōu bù huì ràng rén yì​wài.

    The skill levels of these two boxers are neck and neck; it wouldn't be a surprise no matter who wins.

    Source: Dong Chinese Dictionary