在数学领域的序理论中，偏序集合的紧致或有限元素是还未包含在紧致元素之上的成员的任何非空有向子集的上确界所不能包容的那些元素。注意在数学中还有其他的紧致性概念，还有在常见的集合论中的术语有限的意义不一致于序理论的“有限元素”的概念。
... 紧[致]开拓扑 compact open topology 紧致元素 compact element ; Algebraic lattices 紧致性定理 compactness theorem ...
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雪茄房在空间上同样延续序列、对称感的造型元素，局部添加细节变化，并配合以细腻、紧致的灯光，打造微妙变化的空间。
With several changes in details added, the cigar room keeps the sequential and symmetrical form. It becomes more subtle after elaborately considering lights exert their influence.
紧致毛孔：富含多种微量元素及矿物质，有效预防皮肤干燥、粗糙，紧致毛孔并预防粉刺、痘痘，帮助皮肤恢复健康和焕发活力。
Pore shrinking: microelement and mineral contained can effetely guard against the skin getting dry, rough. Shrink the pore and prevent the acne pox, help the skin recover health and vigor.
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