AddsItem：向应用程序添加新项。
“添加新项”对话框。
但是向现有语言添加一项新的语言功能总是需要付出一定的成本。
But adding new language features to an existing language always has a cost.
用以下表达式定义添加一个新的查询项。
Add a new query item with the following expression definition.
在DataGridView中，更新任意信息，或者添加一个新项，然后单击update。
In the DataGridView, update any information, or add a new item, and click update.
每次查看新对象时，都会将其添加到显示项中。
Each time that you view a new object, it is added to the displayed items.
在任何一种情况下，新项都将添加至列表末尾。
In either case, the new item is added to the end of the list.
将新项添加到集合结尾新项占位符之前。
New items are added at the end of the collection, before the new item placeholder.
将新项添加到集合结尾新项占位符之前。
New items are added at the end of the collection, before the new item placeholder.
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