First and foremost, a valid page is going to display properly.

第一个且最重要的是，有效页面将会正确显示。

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When you've got a valid page, you need to lock that version in.

具有有效的页面之后，需要将此版本锁定。

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Enter a valid username and password in the login page to visit the index page.

在登录页面中输入有效的用户名和密码以访问索引页面。

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For various reasons, the view from London can often be seen as particularly important or valid, which is why this CEBR report has made front page news.

BBC: Scotland Doomed by Comic Economics