fluid direction的用法和樣例：
例句
- After finding the direction of flow and center of the line, we bury copper wire perpendicular to its center.
在知道了流動方向和能線中心后，我埋設了垂直能線中心的銅線。 - Following such a disturbance, it is theoretically possible for the dynamo to reconstitute itself with an opposite direction of current flow.
在這擾動之後，對發電機來說，重新組建一個流動方向相反的發電機在理論上是可能的。
