Harnett said the USAF has no knowledge of any similar incidents happening before.

哈尼特说，美国空军之前根本不知道会发生类似事故。

The USAF radar reports all but ceased Jan. 11, then appeared to show signs of orbital distress when resumed temporarily a few days later.

美国空军在1月11日停止公布雷达报告，当几天后短暂恢复公布时，显示发生了“轨道灾难迹象”。

There was no report of civilian casualties or damage to civilian property, according to a USAF statement.

目前尚无导致平民伤亡或财产损失的报告，据美国空军的声明说。

Thousands of USAF pilots have received advanced training in this twin engine, supersonic jet over the years and the plane is still in use.

用这一对发动机，成千上万的美国空军飞行员收到先进的训练。多年来超音速喷气飞机仍然在使用。

Keys said USAF needs versatile platforms, equally good in a permissive environment or a kick-down-the-door scenario.

基斯说美国空军需要多用途的平台，能够良好地适用于一个宽松的环境或是需要“破门而入”的场合。

The USAF does not know how or why operators lost control of the MQ-9 Reaper Unmanned Aircraft System .

美国空军不知道导航员何以会对MQ-9“收获者”无人飞机系统失去控制。

The other day I got a real USAF fighter pilot jacket at a second-hand shop.

有一天，我得到了一个二手店真正的美国空军战斗机飞行员夹克。

The USAF is a young Service when compared with the Army and Navy, but it has already established a great tradition .

与陆军和海军相比，美国空军是一支年轻的队伍，但它已经建立起了一种伟大的传统。

In the US Air Force, developmental test pilots tend to be graduates of USAF Test Pilot School at Edwards AFB , California.

在美国空军，研究试飞的飞行员大都毕业于加利福尼亚州爱德华兹空军基地的美国空军试飞员学校。

I am very fortunate to have been able to fly with both the RAF, and now the USAF.

我个人非常幸运，同时有英国皇家空军和美国空军的经历。