The next phase, concrete operations, from seven to twelve, you can solve the conservation problem, but still you're limited to the extent you're capable of abstract reasoning.
下一阶段，具体运算阶段，七到十二岁，儿童可以解决守恒问题，但儿童的抽象推理能力仍然有限。
Abstract: economic evaluation includes national economic evaluation and fiscal evaluation, is the important work in various large medium sized project feasibility investigation and decision phase.
摘要经济评价包括国民经济评价与财务评价，是大中型建设项目在可行性研究决策阶段的重要工作。
Abstract: An adaptive formation control algorithm was proposed for multiple autonomous underwater vehicle systems (MAUVS) based on the coupled phase oscillators model.
摘要：针对多水下机器人编队问题，提出一种基于相位耦合振子模型的自适应控制算法。
Abstract: in the construction project management in the whole process, in order to obtain the phase object and realize the final goal, in various activities, we must strengthen the management work.
摘要：在施工项目管理的全过程中，为了取得各阶段目标和最终目标的实现，在进行各项活动中，必须加强管理工作。
Abstract: This paper introduced the all process of urban 1:500 scale Aerophotogrammetry. Technical measures in production are put forward. Work precision in every phase is analysed on statistics.
文摘：论述了城市1：50 0比例尺航空摄影测量的全过程，结合生产实际提出了做好这一工作的技术措施，对各阶段的作业精度进行了统计分析。
Abstract: in this paper, the principles of laser range based on phase and pulse were discussed in this paper, and the advantages and disadvantages were compared and analyzed.
摘要：论文中讨论了相位激光测距和脉冲激光测距的基本原理，并就两种方法的优缺点做了对比分析。
Abstract: This paper introduces the testing results, analysis and design method, and manufacture technology of industrial machine of Nd-Fe-B single-phase synchronous motor.
文摘：介绍了钕铁硼永磁单相同步电动机产品样机的试验结果及分析、设计方案和试制情况。
Abstract: Project cost control runs through the whole process of engineering construction, the completion phase is a key of control of cost.
摘要]工程竣工阶段是工程建设的最后阶段又是工程最终造价的形成阶段，竣工结算审核是造价控制的关键。
Abstract: CPR1000 technique is based on the mature design of Dayabay and LingAo Phase 1 NPP, and is being applied for over 10 in-building units.
摘要：CPR 1000技术方案是基于大亚湾和岭澳一期核电厂的成熟设计，目前有10台在建机组采用该技术方案。
Abstract: The phase transitions of molecular system consisted by double rectangular plates connected by flexible chain are studied in this paper.
摘要：对弹性键相连的双矩形板液晶分子系统的相变进行了研究。
Abstract: The phase transitions of molecular system consisted by double rectangular plates connected by flexible chain are studied in this paper.
摘要：对弹性键相连的双矩形板液晶分子系统的相变进行了研究。
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