eigen vibration

例句：

1. 1. The structure of the material has a significant influence on its eigen vibration.
   材料的结构对其固有振动有显著影响。
2. 2. The engineers carefully analyzed the eigen vibration of the machine to optimize its performance.
   工程师们仔细分析了机器的固有振动，以优化其性能。
3. 3. In this study, we investigated the eigen vibration of a new material under different conditions.
   在这项研究中，我们调查了新材料在不同条件下的固有振动。