undisturbed flow

例句：

1. 1.The river's undisturbed flow is a testament to its natural beauty.
   河流未受干扰的流动是其自然之美的见证。
2. 2. The scientist's undisturbed flow of ideas was inspiring to all who heard him speak.
   科学家流畅的思想表达，让所有听他演讲的人都感到鼓舞。
3. 3. The undisturbed flow of water through the valley was refreshing after the hot summer days.
   山谷中水流的畅通无阻给炎热的夏日带来了一丝清凉。