In fact, we kind of assumed that they were filtering a lot out, the way a sophisticated radar system can ignore echoes from stationary objects on the ground.

事实上，我们推断蝙蝠在分析回声时过滤掉了很多因素，就像一个复杂的雷达系统可以忽略地面上静止物体的回声那样。

youdao

To counter F-22 we can develop more sophisticated radar instead which is much more cost effective.

为了对抗f - 22战斗机，我们可以开发更先进的雷达，而不是它更具成本效益。

youdao

Stealth only works in third world countries where they lack the sophisticated radar and technology that can detect them.

隐形飞机只对第三世界国家起作用，因为他们缺少能探测到这类飞机的精密的雷达和技术。

youdao

He says this is one reason he recommended scrapping plans to build a sophisticated radar system in the Czech Republic and installing ground-based interceptors in Poland.

VOA: standard.2009.09.17

The vehicles will use digital cameras, radar and sonar, married with sophisticated home-grown software, to pick and ping their way through the desert.

ECONOMIST: MONITOR: Robots, start your engines | The

They also use more sophisticated equipment, such a GPS tracking devices and radar, to stalk their prey.

ECONOMIST: Piracy

But the new aircraft will be much more sophisticated, will be far less visible to enemy radar and will have sensors that allow a single jet to take on missions that now require several aircraft.

FORBES: F-35 Joint Fighter Soars, In Cost at Least