secondary flow的用法和樣例：
例句
- Research on Dilute Parti-cles Motion in Secondary Vortex Flow.
旋渦二次流中稀疏顆粒的運動特性研究。 - A particle image velocimetry system was used to measure the secondary flow in the volute cross-section and the blade wake flow.
用粒子圖像速度場儀技術對葉片尾跡區及蝸殼出口橫截面上的二次流做了詳細的變工況測量與分析。
