Although the average was zero, each interval had a maximum (and a minimum) reading. In this graph, my APM is displaying a flat zero line indicating the average but also the maximum value.

虽然平均值是零，但是每一个时间间隔都有一个最大(和最小)读数。

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Note that it can have zero or one values, so you cannot use simple databinding to show the result. Instead, you can write one line of code in the Page_Load to determine the value, and then print it.

注意，Employee可以有零个或多个值，因此无法使用简单的数据绑定来显示结果。

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When grounding fault happens at the time when current is zero, the transient value is too small, in order to prevent it, the paper brings forward the current increment method to select faulty line.

为防止在电流过零点附近发生的接地故障时的暂态量太小，论文提出利用电流增量进行故障选线。

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