列紧集compact: adj. 1.挤满的,密集的;紧密的;(物质)致密的;( ...set: vt. (set; setting) 1.放;搁;贴;靠 ...sequentially compact: 顺序紧密的compact set: 紧集; 紧致集sequentially: 继续地下载手机词典可随时随地查词查翻译