In experiments, a blindfolded harbor seal can detect the passage of a fish by using its whiskers to sense changes in flow velocity - even 30 seconds after its prey has passed by.
在试验中，一只被蒙住眼睛的海豹用胡子感应水流速的变化，从而发现鱼游动的路径——即使那猎物是在30秒以前经过那里的。
Through improving the effects of the figuration and internal structure of box, the flow velocity of nozzle of water curtain system of box type is better even.
对箱体设计进行外形及内部结构的改进后，箱体喷嘴出口的速度达到均匀。
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