4 sentences

1. 他用力拧紧了闹钟的发条。

   tā yòng​lì níng​jǐn le nào​zhōng de fā​tiáo.

   He wound the alarm clock tightly.

   Source: Dong Chinese Dictionary

2. 这个发条玩具可以走很久。

   zhè gè fā​tiáo wán​jù kě​yǐ zǒu hěn jiǔ.

   This wind-up toy can run for a long time.

   Source: Dong Chinese Dictionary

3. 给表上发条。

   gěi biǎo shàng fā​tiáo.

   Wind the watch.

   Source: Dong Chinese Dictionary

4. 有时候我觉得自己像个发条娃娃。

   yǒu​shí​hou wǒ jué​de zì​jǐ xiàng gè fā​tiáo wá​wa.

   Sometimes I feel like a wind-up doll.

   Source: OpenSubtitles