noun 下载 🔗分享 海蝶, 翼足亚纲. Any of free-swimming pelagic sea snails and sea slugs, of the suborder Thecosomata, that have winglike lobes on the feet; a sea butterfly. Examples : "While snorkeling in the clear, tropical waters, we saw hundreds of tiny pteropods fluttering through the ocean like little butterflies. " 在清澈的热带海水中浮潜时,我们看到了数百只微小的海蝶,它们像小蝴蝶一样在海洋中翩翩飞舞。 animal ocean biology nature 与AI对话词汇游戏阅读练习