If the page is unmodified, the page replacement daemon can simply mark the physical memory block as free, and the physical memory block can then be re-used for another page.
如果该分页没有经过修改，那么分页替换守护进程可以简单地将物理内存块标记为空闲，这样一来，就可以将该物理内存块重用于另一个分页。
Although there is no commercial version of eXist, Mark Logic is a good replacement candidate for eXist when performance and scalability requirements go beyond capabilities of eXist.
尽管eXist没有商业版本，但是如果eXist的功能无法满足性能和可伸缩性需求，MarkLogic是不错的替代产品。
South African businessman Mark Shuttleworth became the second space tourist when he purchased a ride on a Soyuz-replacement mission launched in April 2002.
南非商人MarkShuttleworth是第二位太空游客，他乘坐2002年4月执行更换任务的联盟号进入太空。
Smaller runners can get new running shoes at the upper end of the recommendation, while heavier runners should consider replacement shoes closer to the 300 mile mark.
轻量型跑步者可以在400公里时换鞋，而重量型跑步者应该在300公里时考虑换鞋。
Smaller runners can get new running shoes at the upper end of the recommendation, while heavier runners should consider replacement shoes closer to the 300 mile mark.
轻量型跑步者可以在400公里时换鞋，而重量型跑步者应该在300公里时考虑换鞋。
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