flux 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。 - Magnetic flux tubes that tilted away from the vertical can focus and guide the rising material up into the solar atmosphere to form a spicule.
被垂直掀动的磁流管可能聚集并引导物质上升进入大气层内形成针状体。
