参考译文
There is a big difference about the diets between Northern and Southern China．that is．the dishes made by Northern chefs are in heavier taste and those are comparably light in Southern chefs ’recipes．Sometimes．we say it is tasty as sweet and fresh in Southern dishes．In some provinces of China like Ningxia， Hebei，Sichuan，Shaanxi and Yunnan，the diets are made hot and spicy because of the humid cold weather and high altitude．People believe that to sweat is a good method for preventing diseases caused by humidity and cold．
难点注释
1．第一句中，“饮食差异很大”可译为there is a big difference about the  diets；“也就是说”可译为that is；“口味更重”可译为in heavier taste；“相对清淡”可译为comparably light。
2．第二句中，“美味在于它的甜度和新鲜”可译为it is tasty as sweet and  fresh。
3．第三句中，“餐食多为辣味”可译为the diets are made hot and spicy。
4．第四句中，“预防湿冷气候导致的疾病的一个好方法”可译为a good  method for preventing diseases caused by humidity and cold。