1·Even if the water in which the fish are reared starts out fresh, the build-up of faeces and uneaten food soon makes it foul.
即使是养鱼的水也开始变得不新鲜,粪便和吃剩下的食物堆积,很快使水变得污秽。
2·However, an insider disclosed that the KFC operation at which he works keeps uneaten hamburgers on the shelves and only replaces the withered lettuce and applies new sauce.