zhè zhǒng / yú / de / kǒu qiāng / nèi / yǒu / yí ge / kě kuò zhāng / de / náng dài / kě yǐ / zàn shí / chǔ cún / shí wù

这种鱼的口腔内有一个可扩张的囊袋，可以暂时储存食物。

This fish has an expandable pouch inside its mouth that can temporarily store food.