structure of bar system的用法和樣例：
例句
- This paper is directed against the reality problem that it is very difficult to measure the critical speed of the shaft system in a large scale hydrogenerator unit in operating.
針對大型水輪發電機組軸系臨界轉速難以實際測定的現實問題，從理論分析的角度出發，抓住水力機組軸繫結構的基本特點，提出採用較為簡單的模擬結構，試驗研究水力機組軸系固有頻率及其振型特徵。
