英文：A small stone found in the stomach of some reptiles, fish, and birds that aids in digestion by helping grind ingested food material.
中文：胃石一種小石頭，常發現于某些爬蟲、魚和鳥的胃中，通過幫助碾磨食物來幫助消化
英文：Material, usually of plant or animal origin, that contains or consists of essential body nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals, and is ingested and assimilated by an organism to produce energy, stimulate growth, and maint
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