周折

例句：

1. 1.The journey was full of unexpected twists and turns.
   旅途中充满了意想不到的曲折和转折。
2. 2.They encountered many obstacles on their way to the summit.
   他们在攀登过程中遇到了许多障碍。
3. 3. It's important to overcome these challenges in order to succeed.
   克服这些挑战对于成功至关重要。