航线

Multi tool use航线是海上或空中交通工具在两个地点之间的固定移动路线。其中船只的航线称水上航线,水上运输叫做航运,空中交通工具的移动路线則称为飞行航线。[1]
航线的使用包括运输,观光和科学考察,其中以运输为主。在经过第三国领空或者海域的时候,不允許运输工具有偏离航线的移动。航线的形成往往是因为两地之间的贸易所促成的。大航海时代出现的原因之一就是因为欧洲人试图寻找通过大西洋到亚洲的贸易航线。[2]
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