研究了场发射的有效势垒随外加电场的变化，发现在有效势垒随外电场变化的曲线中存在一段平台。
The effective barrier changes with increasing applied voltage, and there is a step in the current of barrier vs voltage.
研究了场发射的有效势垒随外加电场的变化，发现在有效势垒随外电场变化的曲线中存在一段平台。
The effective barrier changes with increasing applied voltage, and there is a step in the current of barrier vs voltage.
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