对比云南白药2025年上半年销售费用占营收11.84%，冷酸灵母公司登康口腔同期占比36%，市场已质疑其营销支出过高，而参半策略更为激进。
This is demand paging. The process thinks it has memory, but the physical allocation is deferred until the page is actually touched. It is completely transparent to the process because the fault, the allocation, and the page table update all happen inside the kernel before the process’s instruction retries. The process never observes the fault.
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日本位于全球地震活动最为频繁的环太平洋构造带，地震发生较为常见。
Иллюстрация: Global Look Press