Air in system. If air gets into the hydraulic system, poor Braking and a spongy pedal will result.

空气进入系统：如果空气进入液压系统，就会产生制动不良和踩下踏板不能产生制动力。

youdao

The most serious deficiency in NATO's air defence is the lack of an identification system to distinguish friend from foe.

北约防空的最大缺陷就是缺乏能够辨认敌友的识别系统。

《柯林斯英汉双解大词典》

The system will soon be operational at Komatsu Air Base in central Japan.

该系统将很快在位于日本中部的小松空军基地投入使用。

youdao

Mars Day at the Smithsonian Air and Space Museum in Washington is a celebration of our solar system's most famous planet.

VOA: special.2010.07.28

The air travel agency is currently testing a radar system at the international airport in Seattle,Washington.

VOA: special.2009.04.01

Engineers on the ground designed a way the astronauts could connect air-cleaning devices from the command module to the air system in the lunar module.

VOA: special.2009.07.22

Ventilation can involve either 100 percent fresh air in which outside air enters and leaves the cabin in a single pass or a system in which various fractions of air are recirculated from the aircraft cabin and mixed with fresh air.

CNN: Commentary: Flu and your health on a plane

Tests after the tragedy revealed that the sudden lurch of the vessel was caused by air in the steering system.

BBC: Holly Buchanan's remains found on Loch Lomond island

Belarus experts to help build new air defense system in Venezuela.

CENTERFORSECURITYPOLICY: China displaces the U.S. at Ecuador's Manta Base