point of contraflexure

例句：

1. 1. The engineer used a pivot to adjust the angle of the machine.
   工程师使用一个支点来调整机器的角度。
2. 2.The car's suspension system is designed to absorb bumps and provide a smooth ride.
   汽车的悬挂系统设计用来吸收颠簸并提供平稳的驾驶体验。
3. 3. The scientist found that the bend point in the material was responsible for its strength.
   科学家发现材料中的弯曲点是其强度的原因。