I quickly increased our speed, calculating the time it would take for the weapons-most likely SA-2 and SA-4 surface-to-air missiles capable of Mach 5 - to reach our altitude.

我立即加速并计算着导弹到达黑鸟飞行高度所需的时间 - 它们很可能是苏联制SA-2和SA-4地对空导弹，最大速度可达3马赫。

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The implication is that, at altitude, players might be coached to have a go at goal from longer distances to take advantage of the straighter, faster trajectories.

这暗示，在高海拔处，球员们可能被指定在较远距离射门，如此可以利用更直更快的轨道。

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The low-pollution plane to carry between 50 and 100 passengers will take off using normal engines powered by biofuel made from seaweed before switching on its rocket engines at altitude.

该低污染的飞机可以搭载50到100名乘客，起飞时飞机使用从海藻中提炼的生物燃料驱动的常规引擎，当爬升到特定高度时，飞机会切换到火箭引擎。

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The big-serving American had hopes of repeating last year's win over Australian Open champion Djokovic in the ATP event at Indian Wells, but was unable to take advantage of the high-altitude conditions in Boise as he went down 7-6 (7-5) 6-2 7-5.

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But today, the World Anti-Doping Agency, known as WADA, is voting on whether to take the mountain away and place altitude tents on next year's prohibited list of substances and methods.

NPR: Anti-Doping Agency Reviews Low-Oxygen Tents

The next day Flamengo issued a statement declaring that the club would not take part in any future matches played at altitude.

BBC: Tim Vickery column