如果不可用，创建一个新项。
This is because item Connector determines whether or not a Jazz item was modified by comparing its new state with its past states.
这是因为ItemConnector通过将Jazz项目的新状态与过去的状态相比较，来决定Jazz项目是否被改动过。
The results show that when the site is not under load, adding a single new item does not have a significant impact on performance.
结果显示，当站点使用非加载方式，添加一个简单的项目并不会会有明显的性能影响。
Next, we declare our new content item as a part that is not attachable via the UI.
接下来，我们将我们的新内容项声明为不能通过UI附加的部分。
A custom tool takes as input the contents of a project item file and generates a new project item file that may or may not be compiled subsequently.
自定义工具以项目项文件的内容作为输入，并生成一个新的项目项文件，随后可能会也可能不会编译该文件。
The collection does not use a new item placeholder.
集合不使用新项占位符。
The collection does not use a new item placeholder.
集合不使用新项占位符。
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