spareadj.备用的；多余的；闲置的v.抽出；饶恕；赦免；节约n.备用品；剩余spare quad备用四心线组spare tank备用槽spare mail垃圾邮件spare mode备用工作方式spare reel备用磁带盘spare room客房spare ribs排骨spare gate备用门spare part备件； 附件spare pair备用线对