It marks the end of America's space-shuttle programme, whose last mission is planned to launch on July 8th (see article, article).
它标志着美国太空巴士项目的完结(其最后的使命是计划7月8号发射)。
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Though designed during the 1950s, this rocket-powered research airplane set speed and altitude marks that were not sur-passed until the advent of the shuttle.