noun🔗Share腹足纲动物，单壳贝。 A univalve mollusk or its shell."The children collected colorful univalves on the beach, carefully placing them in a bucket. "孩子们在沙滩上捡拾着五彩缤纷的腹足纲动物的贝壳（单壳贝），小心翼翼地把它们放在桶里。animaloceanbiologyChat with AIVocabulary GamePractice Reading
