#應付亂流
#改變大小/形狀/質量/體積
#在液體中/上移動
#Manage turbulence
#Modify size/shape/mass/volume
#Move in/on liquids
魚鰭提供流線型外形 (Fins provide streamlined shape)
遠洋魚類如鮪魚的魚鰭是流線型的，因為它們在不需要使用的時候緊貼著身體的凹陷和溝槽
(Fins of ocean-going fish such as tuna are streamlined because they fit close to the body in depressions and grooves when not needed)
