6 sentences

1. 织布机上的梭来回穿行。

   zhī​bù​jī shàng de suō lái​huí chuān​xíng.

   The shuttle on the loom travels back and forth.

   Source: Dong Chinese Dictionary

2. 他在走廊里来回踱步，显得非常焦虑。

   tā zài zǒu​láng lǐ lái​huí duó​bù, xiǎn​de fēi​cháng jiāo​lǜ.

   He paced back and forth in the hallway, looking very anxious.

   Source: Dong Chinese Dictionary

3. 计划已经定好了，就别再来回折腾了。

   jì​huà yǐ​jīng dìng​hǎo le, jiù bié zài lái​huí zhē​teng le.

   The plan is set; stop making unnecessary changes to it.

   Source: Dong Chinese Dictionary

4. 由于正值高峰期，街道上的车辆来回穿梭。

   yóu​yú zhèng​zhí gāo​fēng​qī, jiē​dào shàng de chē​liàng lái​huí chuān​suō.

   Since it's rush hour, vehicles are shuttling back and forth on the streets.

   Source: Dong Chinese Dictionary

5. 那个古老挂钟的钟摆正在箱体里来回摆动。

   nà gè gǔ​lǎo guà​zhōng de zhōng​bǎi zhèng​zài xiāng​tǐ lǐ lái​huí bǎi​dòng.

   The pendulum of that old wall clock is swinging back and forth inside the case.

   Source: Dong Chinese Dictionary

6. 他买了一张去北京的来回票。

   tā mǎi le yī zhāng qù Běi​jīng de lái​huí piào.

   He bought a round-trip ticket to Beijing.

   Source: Dong Chinese Dictionary