The London leg, a 50-km route, is the longest in the 21-city global Olympic Torch Relay outside China.

根据目前确定的情况，伦敦长达约50公里的传递路线将是火炬在全球21个境外城市中传递路途最长的。

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On 21 April 2011, the Superjet 100 performed its first commercial passenger flight, on the Armavia route from Yerevan to Moscow.

2011年4月21日，超级喷气式100飞机进行了首次商业飞行，经亚美尼亚航空线路从埃里温飞往莫斯科。

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The findings from the CORSIM analysis indicate the route diversion plans developed by the County are very effective in terms of traffic operations, reducing overall network delay by an average 21%.

通过CORSIM分析结果显示，从交通运行状况上看，萨拉索塔市的路径变更方案十分有效，使路网整体延误平均降低21%。

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In the opening half, the Nets used a 15-4 run over a five-minute stretch late in the first quarter en route to a 22-21 edge after one.

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The 13.1-mile (21.1km) route started and finish in Anchor Road and takes runners on a harbourside route, which also passes twice under Brunel's Clifton Suspension Bridge.

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The route, which includes 13.3 miles (21.5km) of guided concrete track, is believed to be the longest in the world.

BBC: Cambridgeshire guided bus crash damages tracks