指出在考虑施工活动持续时间不确定的条件下，开展施工网络进度计划和优化研究，具有实际意义；
The research on risks and optimization of the construction network program is of significance when the lasting time of the construction is uncertain.
指出在考虑施工活动持续时间不确定的条件下，开展施工网络进度计划和优化研究，具有实际意义；
The research on risks and optimization of the construction network program is of significance when the lasting time of the construction is uncertain.
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