half-amplitude point

例句：

1. 1. The engineer calculated the exact midpoint of the curve.
   工程师计算了曲线的精确中点。
2. 2. The scientist found a new midpoint in the data that had not been noticed before.
   科学家在数据中发现了一个之前未注意到的新中点。
3. 3.In the design of the bridge, the midpoint between two supports is crucial.
   在桥梁设计中，两个支座之间的中点至关重要。