Two technical principles for constructing real options are also advanced in this section.
本节还提出构造实物期权的两点技术性原则。
Basic principles for constructing schedule-expense-control system are elucidated. The mathematical model for schedule -expense-control is set up in this paper.
通过分析建立“进度-费用”子系统的基本原理，建立起“进度-费用”控制的数学模型。
The fifth part summarizes some of the principles for constructing the network inquiry learning environment and puts forward the research direction for the future.
第五部分，总结了建构网络探究性学习环境的一些原则，提出今后的研究方向。
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