net For those unfamiliar this is a website at courses.cs50.net and has the entire Harvard Course catalog in it and what it has at top left as you might see is definitely your Facebook login button.

还不熟悉的同学可以登录courses。cs50。,整个哈佛大学的课程目录都在上面,在这个网页的左上角,可以看到Facebook的登录链接键。

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In the above searchFormSubmitHandler() function, the code of interest is of course catalog.

在上面的 searchFormSubmitHandler() 函数中，我们感兴趣的代码当然是 catalog.findItems(searchexp, displayItems);

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Of course, you cannot explicitly create or drop these system catalog tables, but you can query and view their content.

当然，不能显式地创建或删除这些系统编目表，但是可以查询和显示这些表的内容。

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