Visualizing a River Vortex 以肉眼上看溪流的漩渦
如果你被困在快速移動的水裡，不管是游泳與還是脫逃的方向。 你沒有辦法強大到可以逆水游泳。，最重要的是不驚慌
If stuck in fast moving water, the most important thing is to not panic. Swim with the current to escape. You won't be strong enough to swim against the current.