阿波罗工程中使用的所有飞船都不能重复使用，令其实施起来代价高昂。

All of the crafts used on the Apollomissions were single-use, making the Apollo missions extremely expensive.

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之后我们驾车去了康拉德。丹嫩贝格和其他许多在阿波罗工程中作出重要贡献的德国工程师的墓地。

Then we drive to the grave of Konrad Dannenberg and a lot of other important engineers from Germany who were in the Apollo Project.

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当然，假如真的存在能够证明1969年阿波罗登月的确是一场骗局的有力的证据，那怀疑论者也必须对随后的探月工程给出合理的解释，包括12名宇航员。

Of course, even if there was some credible evidence showing that the 1969 Apollo moon landing was a hoax, conspiracy theorists must also account for later moon missions, involving a dozen astronauts.

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