fundamental vibration-rotation region

例句：

1. 1. The fundamental vibration of the material iscrucial for its strength and durability.
   材料的基本振动对其强度和耐用性至关重要。
2. 2. The rotationregion of the planets is a fascinatingtopic in astronomy.
   行星的旋转区域是天文学中一个引人入胜的话题。
3. 3. The engineer studied the fundamental vibration-rotation region of the structure to ensureits stability.
   工程师研究了结构的基频振动-旋转区域，以确保其稳定性。