noun 下载 🔗分享 水螅,水螅虫。 Any of many colonial coelenterates that exist mainly as a polyp; a hydrozoan Examples : "The marine biologist pointed out the delicate, branching structures of the hydroids attached to the pier, explaining that they were colonies of tiny, individual animals. " 那位海洋生物学家指着附着在码头上的、精致而呈分支状的水螅虫结构,解释说它们是由微小的个体动物组成的群体。 organism animal biology ocean 与AI对话词汇游戏阅读练习