您可能符合不同种类的签证。
申请人前往美国的目的应该是决定其申请何种类型签证的关键性评判标准。
The Purpose of travel is always the controlling criterion for determining a proper visa classification.
壹些种类的签证，例如f3和f4，可能会拖延几年之久。
For some visa categories, for example F3 or F4, this delay could be many years.
壹些种类的签证，例如f3和f4，可能会拖延几年之久。
For some visa categories, for example F3 or F4, this delay could be many years.
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