有些人不明白为什么国家要在太空项目上投入数百万美元。

Some people wonder why countries spend millions of dollars on space projects.

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我们家中所使用的无线手提工具，比如真空吸尘器、手电筒、钻头和锯，都来自于早期太空项目里的技术。

The cordless, hand-held tools we use in our homes, such as vacuum cleaners, flashlights, drills and saws came from the technology of these early space programs.

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但是，要说服那些怀疑者商业太空项目是有前途的，我们就必须做到。

But if we want to convince those skeptics that commercial space really can get the job done, we're going to have to deliver.

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