noun 下载 🔗分享 草履虫 An oval-shaped protozoan organism of the genus Paramecium. Examples : "In science class, we observed a paramecium swimming under the microscope. " 在科学课上,我们用显微镜观察了草履虫游泳。 organism biology microorganism animal 与AI对话词汇游戏阅读练习