Power of shape: here's a whale. We've seen that the fins of this whale have tubercles on them. And those little bumps actually increase efficiency in, for instance, the edge of an airplane -- increase efficiency by about 32 percent.
形状的威力：这是一只鲸鱼 我们看到这只鲸鱼的鳍上有许多圆形瘤状突起 这些小突起其实能提高效率， 例如说， 设置在机翼的边缘，效率能提高 32%。