此时，细心的读者也许感觉到：做到有计划的拖延意味着一定程度上的自我欺骗，因为人们实际上总是在不断上演Pyramid scheme（金字塔计划，类似传销活动，喻不可持续的欺骗活动）。
The observant reader may feel at this point that structured procrastination requires acertain amount of self-deception, since one is in effect constantly perpetrating a pyramid one scheme on self.
巨大的音乐会和许多计划的庆祝活动将持续整个白天和晚间。
A huge concert and several more concerts and parties planned throughout the day and evening.
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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