Plans to upgrade air-traffic-control technology to a modern satellite-guided system have faced repeated delays.

升级空中交通管理技术为现代卫星导航系统的方案一直拖延着。

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Precision guided system based on image matching has higher precision and reliability.

基于图像匹配的精确制导系统具有更高的精度和可靠性。

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Using the intraoperative planning function of the image-guided system, the largest diameter screw possible in each particular case was placed.

利用图像引导系统的术中计划的功能，针对每个病例选用最大直径的椎弓根钉。

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The system uses small radar-guided missiles to blow up incoming rockets with ranges of between five and 70 kilometers.

VOA: standard.2010.07.20

In the procedure, a catheter system, guided by ultrasound was inserted into an artery in the leg then threaded up through the aorta and into the coronary arteries.

BBC: 'Revolution' in heart bypass ops

The first involves disabling CTGF with human antibodies, the guided missiles of the immune system.

FORBES: Scar Wars

To ensure the weapon hits the target, the system can be guided by GPS, inertially, or by laser designation.

FORBES: Raytheon's New Collateral Damage Minimizing Munition