在任何瑞士机场或边境车站与任一瑞士目的站点之间的双程交通。
A round trip transfers by rail between any Swiss airport or border station to any single destination in Switzerland.
然而，在一个瑞士机场的机库内，停放了一架不需要任何一点燃油的飞机。
Yet inside a hanger at a Swiss airfield is the prototype of an aircraft that does not use any fuel at all.
这架利用太阳能脉冲的飞机，其翼展类似一个超级喷气式客机，但这重辆却与一辆轿车差不多，该飞机从瑞士机场起飞。
The Solar Impulse, with a wingspan similar to that of a super-jumbo jet but weighing the same as a saloon car, took off from a Swiss airfield.
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