| 单词 | 衬层 |
| 释义 | 〔gizzard〕A modified muscular pouch immediately behind the stomach in the alimentary canal of birds, having a thick lining and often containing ingested grit, which aids in the mechanical breakdown of seeds before digestion.砂囊，胗：紧靠在鸟类食道的胃部后面的变化的肌肉小袋，有厚的衬层并含有摄取的砂粒，有助于在消化之前磨碎种子 |
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