vibrational period

例句：

1. 1.The vibrational period of the material is critical to its performance.
   材料的振动周期对其性能至关重要。
2. 2.The vibrational period of the structure is important for its stability.
   结构振动周期对于其稳定性非常重要。
3. 3. The vibrational period of the system can be calculated using the formula.
   系统振动周期可以通过公式计算得出。