n.交换；交换技术
动词swap的现在分词.
He was quite keen on swapping books with friends. 他非常热衷于和朋友们交换书籍。
She ended up swapping jobs with her secretary. 她最终与她的秘书交换工作。
Virtual memory Games tend to be huge consumers of memory, so any memory swapping is bound to produce slow-downs. 虚拟内存游戏趋于消耗大量的内存，所以任何一个内存交换技术必然会产生缓慢下调。
