Republican senators do not want to be seen as enabling the budget bill by supporting the infrastructure one.

共和党参议员不希望因为支持基础设施法案而被视为批准了预算法案。

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

但它们的大小相当于轻型飞机，需要相当多的配套基础设施，如跑道和加油设施。

But one important item not to overlook is the fact that there will likely need to be many exclusively cargo missions as well, in order to send the critically needed supporting infrastructure and supplies.

但一个不容忽视的重要问题是，为了运送急需的辅助基础设施和物资，很可能还需要许多专门的货运任务。