Data inputs and outputs are visible when the model is viewed in advanced editing mode; in basic mode only the control flow is visible.
当在高级编辑模式下查看模型时，数据输入和输出是可见的；在基本模式下则只能看到控制流。
As the basic of tourism industry chain, tourist flow is becoming much more important. The research on the mode of driving tourist flow is a new hot topic of tourism industry.
旅游客流作为旅游产业链的基础，其重要性日益突出，因此旅游客流驱动模式研究已成为旅游界研究的一个新热点。
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