澳大利亚广袤的国土以及其主要城市间的距离使得它比大多数可与之相比的国家更依赖航空运输。
Australia's great land mass and the distances between its main cities make it depend on air transport more than most comparable countries.
航空运输的费用是公路运输的五倍，铁路运输的二十倍之多，但是它在通常情况下更加准时，可靠和可预见性。
Air freight costs 5 times more than transportation by trucks and 20 times more than by rail. But it is more reliable, punctual and predictable under normal operating condition.
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