它们在浅海的沉积物中扭来扭去，把猎物吞进袋状的微小躯体里，把水从嘴巴周围的圆锥形喷口排出去。
They wriggled around in the sediments of shallow seas, gulped prey into their minuscule, baglike bodies and expelled the water through cone-shaped spouts around their mouths.
它们在浅海的沉积物中扭来扭去，把猎物吞进袋状的微小躯体里，把水从嘴巴周围的圆锥形喷口排出去。
They wriggled around in the sediments of shallow seas, gulped prey into their minuscule, baglike bodies and expelled the water through cone-shaped spouts around their mouths.
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