noun 下载 🔗分享 叶轮,推进器 Something which or someone who impels, usually a part of a pump. Examples : "The water pump's impeller spun rapidly, forcing water through the cooling system. " 水泵的叶轮飞速旋转,将水压入冷却系统。 machine technical part device utility 与AI对话词汇游戏阅读练习