noun 下载 🔗分享 无脊椎动物，无脊椎 প্রাণী。 An animal without vertebrae, i.e. backbone. Examples : "Many students learn about invertebrates, like insects and worms, in biology class because they are animals without a backbone. " 很多学生在生物课上学习无脊椎动物，比如昆虫和蠕虫，因为它们是没有脊椎骨的动物。 animal biology organism 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 没骨气的人, 懦夫。 A spineless person; a coward. Examples : "He promised to defend his friend, but when the bully arrived, he became one of the invertebrates who stood silently by. " 他答应过要保护朋友，可当恶霸来了，他却变成了一个没骨气的人，在一旁一声不吭地站着。 character person 与AI对话词汇游戏阅读练习
