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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Without the message shown in the electrical notice board inside the train, we could not have believed that we are now running at the altitude close to 5000 meter.

这抬升的过程是在不知不觉中发生的，如果不是留意到车厢内电子告示栏里显示的信息，根本无法相信我们已经行驶在近5000米的海拔高度上。

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The actual peak altitude was undoubtedly close to that targeted.

实际山顶海拔高度，无疑是接近这一目标。

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He had run two hours, 21.23 minutes a month before the Games but that effort had been at altitude and close to home in Abbis Adaba.

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Those two brief stretches of time when all electronic devices must be turned off -- after the doors to the plane close until it is at cruising altitude, and then again on approach for landing -- are being questioned.

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It was, she decided, close to ideal, owing to its medium altitude, gentle slopes and unself-conscious charm.

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