The Air Force quickly became the think tank's main contractor, and Rand began consulting on everything from propeller turbines to missile defense.

空军很快成为了这家智库的主要承包商，兰德开始就从螺旋桨涡轮到导弹防御等一切问题进行咨询。

youdao

The main square has a fountain that spouts water 40 feet into the air.

主广场有个喷泉，喷水高达40英尺。

《柯林斯英汉双解大词典》

By early yesterday, the insurgents had taken control of the country's main military air base.

到昨天早些时候，那些起义者已控制了该国的主要空军基地。

《柯林斯英汉双解大词典》

Mister Zundt says diesel vehicles are the main cause of air pollution in Sao Paulo.

VOA: special.2009.09.07

In the days following the attacks, guards were placed in front of two large air intake ducts that provide the main external air supply to the Capitol building, sources have told CNN.

CNN: U.S. Capitol getting security overhaul

At Rhein-Main Air Base in Frankfurt, flights increased dramatically from mid-afternoon Sunday to mid-day Monday.

CNN: Finally, troops leave Germany for Bosnia

Rebels opposed to President Laurent Kabila in Congo captured Kindu, the government's main air base and headquarters in the east.

ECONOMIST: Close call