One of the big disincentives to placing weapons in space has been the technical difficulty and cost of such an enterprise.
一直
来,在太空部署武器的主要障碍之一就是技术难

该项事业的高昂成本。
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.
一直
来,在太空部署武器的主要障碍之一就是技术难

该项事业的高昂成本。
声明:
上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎向我们指正。