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建立了某型自行火炮虚拟样机模型,仿真并获得了各典型行驶工况下行动系统关重件的载荷时间历程。
The virtual prototype of the self-propelled gun was established, the load of the key components of running system under various driving conditions was simulated and obtained.
科尔曼的理性选择理论是由包括行动系统、行动结构、行动权利以及社会最优等四组基本概念构成的。
The theory was made up of such basic concepts as action system, action structure, action privilege and social optimum.
教育家多里·罗伯茨决定付出行动,改变这个系统。
One educator named Dori Roberts decided to do something to change this system.
Part of the problem with using operant conditioning with babies is it's difficult to get them to behave in any systematic way.
应用操作性条件作用的部分问题在于,很难使婴儿们按照系统的方式行动
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