One of the big disincentives to placing weapons in space has been the technical difficulty and cost of such an enterprise.

以来,在太空部署武器的主要障碍之
就是技术难度以及该项事业的高昂成本。

词
词
进因素,激发因素;One of the big disincentives to placing weapons in space has been the technical difficulty and cost of such an enterprise.

以来,在太空部署武器的主要障碍之
就是技术难度以及该项事业的高昂成本。
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