After refuelling at Bangkok, they flew on to Singapore.

在曼谷加油后，他们飞往新加坡。

But they are the size of light aircraft and need considerable supporting infrastructure, such as runways and refuelling facilities.

但它们大小相于轻型飞机，需要相配套基础设施，如跑和加油设施。

And refuelling it is a bit of a pain.

加油有点痛苦。

As a result, they will probably have to remain at least 1,000km away from shore, a distance that their warplanes cannot cross without refuelling.

因此，他们可能不得不在离岸至少1000公里地方停留，这是他们战机不加燃料就无法跨越距离。

Earlier plans by Airbus to make planes in America were thwarted when Boeing beat it to win a large order for mid-air refuelling tankers from the Pentagon.

波音公司曾挫败了空客早期在美国造飞机计划，并从国防部赢得一笔很大空中加油飞机订单。