One of nature's most curious relationships is that between the pilot fish and the shark. The latter could swallow the former in a single gulp, but instead the huge predator allows its tiny companion to pick uneaten food from between its teeth. The pilot fish gets a free meal, the shark a free dental plan.
원문출처 : http://www.cnn.com/style/article/alpina-bmw/index.html
원문출처 : http://www.cnn.com/style/article/alpina-bmw/index.html