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你听说过“零区”吗？
Have you ever heard of zone zero?
youdao
含有电弧电压在零区梯度信息的指标可以有效地反映故障位置。
An index within the gradient information of the arc voltage on the local region of zero can reflect fault location effectively.
昨天，那一地区发生过零星的战斗。
There was spasmodic fighting in the area yesterday.
《牛津词典》
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