normal mode frequencies的用法和樣例：
例句
- In this article, the molecular vibration frequencies are determined by Laman scatters experiment, then the molecular structure is obtained.
該文通過樣品實驗，用拉曼散射測定分子的振動頻率，進而分析出物質的分子結構。 - The main object of this paper is to investigate the natural frequencies and model shapes offree vibrations of shallow spherical shells on the two-parameter elastic foundation.
本文研究雙參數彈性地基上扁球殼的自由振動頻率和振型，推導了計及地基慣性力影響的扁殼自由振動控制方程。
