“数据源”窗口中的每个可绑定项都有一个控件列表，该列表可通过选择项，然后单击附加到项的下拉箭头来访问。
Each bindable item in the Data Sources window has a control list that is accessed by selecting the item and then clicking the drop-down arrow attached to the item.
“数据源”窗口中的每个可绑定项都有一个控件列表，该列表可通过选择项，然后单击附加到项的下拉箭头来访问。
Each bindable item in the Data Sources window has a control list that is accessed by selecting the item and then clicking the drop-down arrow attached to the item.
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