noun 下载 🔗分享 海蝶, 翼足亚纲动物。 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 blue water, we saw a tiny, almost transparent pteropod fluttering its wing-like feet as it swam past. " 在清澈的蓝色海水中浮潜时,我们看到一只非常小、几乎透明的海蝶,它拍动着翅膀般的足,从我们身边游过。 animal ocean biology nature organism fish 与AI对话词汇游戏阅读练习