turn arc

例句：

1. 1. The turn in the road was sharp and unexpected.
   道路的转弯处非常陡峭且出乎意料。
2. 2. The turn is a crucial moment in the story.
   这个转折点是故事中至关重要的时刻。
3. 3. The turn in the conversation led to a new direction for us.
   谈话中的转折点为我们指明了新的方向。