这条山路又窄又曲折，开车时一定要小心。

Zhè tiáo shānlù yòu zhǎi yòu qūzhé, kāichē shí yídìng yào xiǎoxīn.

This mountain road is narrow and winding, so you must be careful when driving.

他的求学经历非常曲折，但最终还是拿到了博士学位。

Tā de qiúxué jīnglì fēicháng qūzhé, dàn zuìzhōng háishi ná dào le bóshì xuéwèi.

His journey of study was very full of twists and turns, but in the end he still obtained his PhD.