剑桥词典a brand name for a type of shoe or sandal (= open shoe ) that is very comfortable , is made from natural materials , and is thought to be typically worn by people who care a lot about the environment 勃肯鞋（環保人士常穿的一種很舒適的鞋） Birkenstock sandals hippy , Birkenstock-wearing liberals 返回 Birkenstock