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许多食草恐龙都有吃石头的习惯。原来,恐龙牙齿一般只有撕咬的功能,不会咀嚼,只能囫囵吞食。吃下这些石头,是为了帮助胃把食物磨碎、消化。这些石头就是胃石。
Many herbivorous dinosaurs have the habit of eating stones. It turned out that dinosaur teeth are generally only the function of bite, will not chew, only 囫 囵 swallow. Eat these stones, is to help the stomach to food grinding, digestion. These stones are stomach stone.