So clearly this animal knows where it's going and it knows where it wants to go, and that's a very, very important thing, because if you think about it, you're at the dung pile, you've got this great big pie that you want to get away from everybody else, and the quickest way to do it is in a straight line.
非常明显这个小东西有方向感 而且知道要往哪里去。 这是非常、非常重要的一件事情 你自己想想看，你站在粪堆上， 你现在有了一个粪球，而你想要它离别的蜣螂远远的， 最快的转移路线就是一条直线。