求翻译：其基本方法是是在不改变网络计划中各项工作之间逻辑关系的前提下，通过压缩关键工作的持续时间来达到优化目标。在工期优化过程中，按照经济合理的原则，不能将关键工作压缩成非关键工作。是什么意思？

The basic method is to achieve the optimization goal does not change the premise of the logical relationship between the work of the network planning, through the compression of the duration of the critical work. Time Optimization of the process, in accordance with the principle of economic rational

It is the basic method is to not change the network program in the logical relationship between the work of the critical work by compressing the time duration to achieve optimization goals. In deadlines during the optimization, in accordance with the principle of rational economic and critical work

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The basic method is to be without changing the logical relationship between the work of the network plan, subject to work with compression key duration to achieve the optimal goal. Duration in the optimization process, in accordance with economic principles of reasonable, not working key into a non-

Its essential method is in does not change in the network planning between each work under the logical relations premise, achieves the optimized goal through the compression key work duration.In the time limit for a project optimization process, according to the economical reasonable principle, cann