#改變位置
#在液體中移動
#Modify position
#Move in/on liquids
身體運用渦流來節能 (Body uses vortices to save energy)
在流體環境中，虹鱒運用身體與渦流的交互作用，來降低游動時所需的能量
(The body of rainbow trout decreases energy required for swimming by interacting with vortices in its fluid environment.)
