单词：stream tube
stream tube的用法和样例：
例句
- In such a mode, every channel is a stream tube fixed in space.在这样的模型里，每根管子都是固定在空间上的一个流管。
- To derive the Bernoulli equation, we apply the work-energy theory to the fluid in a section of a flow tube.我们应用功能原理来导出流体在一段流管流动的伯努利方程。
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