HTTP 说明请求的内容在服务器上不存在了，同时是永久性的丢失。如果不清楚是否为永久或临时的丢失，应该使用

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

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