And forget using jet fighters armed with short-range weapons to attack the American navy.

并且，忘掉用装备有短程武器的喷气战斗机来袭击美国海军这回事吧。

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A pair of Skyraiders even shot down a MiG-17 "Fresco" jet fighter which was foolish enough to engage in a head-on attack.

甲对Skyraiders甚至击落一架米格17“壁画”飞机战斗机是愚蠢到进行正面攻击。

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The results show that the performance of optimized fan is improved by lowering the energy loss which caused by the secondary flow vortex, the volute tongue, the wake-jet and the angle of attack.

研究结果表明：通过优化有效降低了因二次流漩涡、风机蜗舌结构、尾流-射流和正冲角等造成的能量损失，提高了离心通风机性能。

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Since the attack, Executive Jet, a company that offers part-ownership of private jets, has been deluged with calls.

ECONOMIST: Can it ever again be business as usual?

It took the group only two or three months to mobilize Umar Farouk AbdulMutallab, the so-called Underwear Bomber, charged in the Christmas Day 2009 bombing attack on a Northwest Airlines jet.

CNN: Former CIA chief: Military is 'bad option' against Iran

Meanwhile in Washington, the Pentagon - the heart of the US defence establishment - reopened on Wednesday, even though only half of the building is safe for use after attack by another crashing hijacked jet.

BBC: Welshman filmed early crash shots