Activity 类型字段是一个下拉列表。

The Activity type field is a drop-down list.

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要更改类型，您只需选择类型字段，并从下拉框中选择类型。

To change the type, you could just select the type field and select it from the drop-down box.

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Assign只能用于为简单类型字段指定值，比如字符串和整数。

Assign is only available for assigning a value to simple type fields, such as string and int. To create an assign mapping.

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