CNN air travel expert Richard Quest said the twin-engine plane, a stalwart of transatlantic routes, had an impeccable safety record, with only one fatal incident involving a training flight in 1994.

美国有线电视新闻网的空中旅行专家理查得·卡斯特说这架双引擎飞机，有一个坚定的跨大西洋航线，并有着近乎完美的安全飞行记录，只是在1994年的一次飞行训练出现过致命事故。

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"The fine particulate matter is what affects visibility and makes it look like a horrible foggy day," said Cornell air quality expert Westerdahl. "it also is what most directly affects human health."

“这些微细颗粒物是影响可见度，让天空看起来雾茫茫的原因，”康奈尔空气质量专家威斯·特达说，“它也是最直接影响健康的因素。”

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Without his expert marksmanship and accurate description of the area, the JTAC would not have been able to provide accurate grid locations for close air support.

如果没有他的准确射击和专业描述，联合战术空中控制员不可能提供准确的近距离空中支援所需的座标。

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Air Force pilot Gordon Cooper became an expert on the Redstone Rocket that would launch Mercury astronauts on short training flights.

VOA: special.2009.06.10

One in ten deaths from lung cancer in the UK may be linked to air pollution, an expert has said.

BBC: Traffic

Paris (CNN) -- It should become easier to find flight data recorders in the wake of the Air France Flight 447 disaster, an aviation industry expert says.

CNN: Flight 447 sparks black box rethink

Could the same issues pertain to other expert observers like MRI technicians, air traffic controllers, and police officers?

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