Since the new times, some armies writers have started to change their visions to the servicemen and extend their brushwork to a case of the whole servicemen and the depth of the human nature.
新时期以来，军旅作家开始把目光转向军人自身，把笔触伸向军人群体的个案和人性深处。
The axcion can produce a non-diffracting beam, and it is used to extend depth of field of optical imaging system, and the theorem of this method is analyzed in this paper.
利用轴锥镜能产生无衍射光的特性，分析了将其应用到成像系统中增大景深的原理。
The axcion can produce a non-diffracting beam, and it is used to extend depth of field of optical imaging system, and the theorem of this method is analyzed in this paper.
利用轴锥镜能产生无衍射光的特性，分析了将其应用到成像系统中增大景深的原理。
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