他们在构建阶段的后期开始，因为我们需要足够数量的子系统来调整集成的工作。
They started later in the construction phase, because we needed a sufficient number of subsystems to justify the integration effort.
他们在构建阶段的后期开始，因为我们需要足够数量的子系统来调整集成的工作。
They started later in the construction phase, because we needed a sufficient number of subsystems to justify the integration effort.
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