问题：皮带的功能有哪些？
What are the uses of a leather belt?
答案帖文：
1935年8月，任弼时（中共第一代领导集体的重要成员）与贺龙（中国人民解放军主要创始人之一）等人率部长征过草地时，许多战士因为饥饿昏倒。在找不到任何食物的情况下，任弼时和警卫员将皮带切成若干段，放到锅里煮，每次每人只能分得3小块。虽然味道难闻、难以下咽，但他们却风趣地称为吃“煮牛肉”。
当时的皮带不是现在经过工业化加工制成的皮带，而是当年农牧民经过简单初加工的皮制品，以及原本就是准备在路上充饥的皮带。
In August 1935, during the course of the Long March, Ren Bishi, one of the first-generation leaders of the CPC (Communist Party of China), and He Long, one of the founders of the PLA (People's Liberation Army), led their troops across arid grasslands. Many soldiers passed out from starvation. Suffering from hunger, Ren and his men had to boil their leather belts for food, and each person only got three small pieces for a meal. Despite the belts' foul smell and yucky taste, they jokingly called them "boiled beef."
Unlike the belts we see today, the leather belts used by the Red Army were simply processed cow skin. Some of them were carried as food for the long journey.