其最后的性能要在现场条件下，根据规定的任务使命进行测定。
Its ultimate performance must be tested in the field according to its specific missions.
正在执行最后一次使命的“发现号”航天飞机目前停靠在国际空间站。
S. space shuttle Discovery, which is docked at the International space Station.
正在执行最后一次使命的“发现号”航天飞机目前停靠在国际空间站。
S. space shuttle Discovery, which is docked at the International space Station.
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