默认条件下，只有界面的对话框区域会被为设备上显示而转化。

By default, only the dialog area of the screen is transformed for display on the device.

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只有当体系中两相都存在时，在液体和气体之间才有界限分明的界面。

Only when both phases are present in the system is there a clear-cut distinction between liquid and gaseous states.

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