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user8341 我只看 mdn 。
The /* */ comment syntax is used for both single and multiline comments. There is no other way to specify comments in external style sheets. However, when using the <style> element, you may use <!-- --> to hide CSS from older browsers, although this is not recommended. As with most programming languages that use the /* */ comment syntax, comments cannot be nested. In other words, the first instance of */ that follows an instance of /* closes the comment.