curve
/kərv/
the trace of a point whose direction of motion changes
Chinese meaning: 曲线；弯曲
The road ahead has a sharp curve that requires careful driving.
前方的道路有一个急弯，需要小心驾驶。
The graph shows a curve representing population growth over time.
图表显示了一条代表人口随时间增长的曲线。