level detection短语¹⁴⁴⁹⁷²⁺² 基本例句 电平检测 During this paper, definition of the measure enter- cover- probability is given, and three-dimension detection space are transformed to level detection circles on different heights. 为了分析主动探测空间动态性能，本文首先提出以“目标进入雷达覆盖区概率”简称为“覆盖率”作为评价指标； fabiao