noun 下载 🔗分享 电磁铁 A magnet which attracts metals only when electrically activated Examples : "The junkyard uses strong electromagnets to lift and move heavy scrap metal. " 废品回收站使用强大的电磁铁来吊起和移动重型废金属。 physics technology electronics energy device machine electric science 与AI对话词汇游戏阅读练习