另一个棘手的问题是，嵌入在页面头元素的脚本，必要要等页面加载完成后才能被调用。
One other really big issue is that unless you embed your scripts in the body of a document you’ll have to start them when the document has finished loading.
需要两条路径：一条默认的路径用来查找主页面，而另外一条路径则通过标头来查找页面。
Two routes are required: a default route to find the home page and another route to find a page by its slug.
请在页标题、页头栏和页面正文的第一句话中使用这些关键词。
Use these keywords in the page title, page heading, and first sentence of the page's body.
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