minor critical speed

例句：

1. 1. The aircraft's minor critical speed is 500 knots.
   该飞机的次要临界速度为500节。
2. 2.The research team determined the minor critical speed of the material at 300°C.
   研究团队确定了该材料在300°C时的次要临界速度。
3. 3. The engineer calculated the minor critical speed for the new design to ensure stability.
   工程师计算了新设计的小临界速度以确保稳定性。