This is a good debugging technique to make sure a problem isn't resulting from stale data in the browser cache.
这是一种好的调试技巧，可以确保问题不是由于浏览器缓存中陈旧的数据造成的。
This technique is the least favorable and has the least browser support.
这种技术最不推崇，提供支持的浏览器也少。
The key to making this technique work is the tag, which is manipulated on the fly before being sent back to the browser for further processing.
要让此技术发挥作用的关键是标记，该标记在被发送到浏览器做进一步处理之前可被动态操纵。
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