有些三维系统可以把材料的属性和内部结构印刷成各式各样。
Some 3D systems allow the properties and internal structure of the material being printed to be varied.
在三维系统中实时渲染二维图层是实现紧密型二三维结合GIS的关键。
Rendering 2d GIS layer in 3d environment is the key problem of realizing compact type of the two and three dimensional integration GIS system.
该解决方案提出的协同指挥功能，可实现物理上分布各处的各职能工作人员，对同一事故地点的三维场景从同一角度去查看，并可以用三维系统自带的平台进行对话。
The joint direct function promoted in this solution can deploy manpower, and you can observe an accident spot from an angle and have a conversation through the 3D platform.
结果表明：电子-声子耦合达到一定强度时声学极化子有效质量发生突变而使极化子自陷，声学极化子在二维系统中比三维条件下更容易自陷。
The results indicate: the effective mass of an acoustical polaron undergoes a sudden increasing when thee-p coupling constant achieves the critical value and then the self-trapping occurs.
结果表明：电子-声子耦合达到一定强度时声学极化子有效质量发生突变而使极化子自陷，声学极化子在二维系统中比三维条件下更容易自陷。
The results indicate: the effective mass of an acoustical polaron undergoes a sudden increasing when thee-p coupling constant achieves the critical value and then the self-trapping occurs.
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