Spatial extent短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 空间延长 In these applications, the target is far from the sensor, and so their images in the sensor would be very small and low spatial extent, and even being hidden in the background. 在这些应用中，目标距传感器较远，它们在传感器中的成像为小目标，相对于背景噪声而言，目标强度较弱，甚至被噪声所淹没。 fabiao