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fix(cdn.md)：修改错别字 #2025

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Snailclimb merged 1 commit into from
May 21, 2023
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fix(cdn.md)：修改错别字 #2025

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2 changes: 1 addition & 1 deletion docs/high-performance/cdn.md
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Expand Up @@ -54,7 +54,7 @@ head:

你可以通过预热的方式将源站的资源同步到 CDN 的节点中。这样的话，用户首次请求资源可以直接从 CDN 节点中取，无需回源。这样可以降低源站压力，提升用户体验。

如果不预热的话，你访问的资源可能不再 CDN 节点中，这个时候 CDN 节点将请求源站获取资源，这个过程是大家经常说的 **回源**。
如果不预热的话，你访问的资源可能不在 CDN 节点中，这个时候 CDN 节点将请求源站获取资源，这个过程是大家经常说的 **回源**。

**命中率** 和 **回源率** 是衡量 CDN 服务质量两个重要指标。命中率越高越好，回源率越低越好。

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