In a key risk reduction flight test, Northrop Grumman's Proteus test aircraft and a NASA Global Hawk flew as close as 40 feet apart at an altitude of 45,000 feet, an industry-setting record.

在飞行试验中，诺斯罗普·格鲁门公司的一架Proteus试验机和美国航天局的一架全球鹰飞行在13716米(4.5万英尺)的高空，距离接近12.2米(40英尺)，创造了行业纪录。

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Patients with es are at particularly high risk at times of volume depletion, surgery, anesthesia for any indication, exposure to high altitude, and strenuous activity.

ES病人特别是在容量减少、手术、麻醉、高原以及情绪紧张时风险很高。

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High altitude Pulmonary Edema (HAPE) is an altitude idiopathic disease which causes fatal risk.

高原性肺水肿是一种具有致命危险的高原特发病。

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The low-risk, high-altitude bombing cannot grow markedly more effective unless the allies are willing to accept more casualties--theirs and ours.

CNN: IT'S FLIGHT OR FIGHT

Benedict is 85 and the city's high altitude poses a risk to the pope's health, say Vatican officials.

CNN: SHARE THIS

Flamengo's second complaint is that playing at altitude puts the lives of the players at risk.

BBC: Tim Vickery column