...段，分别为感觉动作期（Sensory-motor Period）、前运 思期（Preoperational Period）、具体运思期（Concrete Operation Period） 和形式运思期（Formal Operation Period），儿童自出生后的学习及思 考能力，会随著年龄增长而改变其阶段历程，其改变阶段顺序不...
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But in concrete construction to operation of the cooling period by the highest temperature stability temperature, often in concrete caused considerable internal pull stress.
但是在施工中混凝土由最高温度冷却到运转时期的稳定温度，往往在混凝土内部引起相当大的拉应力。
The prestressed concrete bridge in long-term operation service period, may appear the phenomenon of cracking and deflection.
预应力混凝土桥梁在长期运营服役期内，会出现开裂和下挠现象。
Through bearing capacity test and quite a long period of operation, the structure and anchorage measures of concrete crane girder are proved to be reasonable.
通过承载试验成果及一段时间的运行表明，岩壁吊车梁体形及锚固措施设计是合理的。
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