如果数据库具有验证代码，这些代码要求在保存文档之前，各个字段都必须填写完整，并且如果还未填写完整就试图保存文档会产生各种错误，该怎么办？
What if your database has some validation code that requires various fields to be filled before the document can be saved, and will produce all sorts of errors if you try to save before that?
这个例子演示了怎么在一个HTML文档中建立表格。
This example demonstrates how to create tables in an HTML document.
但是如果在同一文档中组合使用这些元素类型，比方说在部门、部门地址及其Web服务器的列表中，会怎么样呢？
But what if they are combined in the same document, such as a list of departments, their addresses, and their Web servers?
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