无涂饰木材表面镜面反射光泽度较低，大多分布于10%以下的范围，分布中心在5%左右。
The reflection wood surface gloss in mirror is low for no cover with paint, most of distribution is blow 10%, the distribution center is in 5% or so.
移动自组网无中心、无基础设施等特性决定了在这种网络中提供证书服务必须采用分布式的体系结构。
The certification service must adopt distributed architecture in mobile AD Hoc networks due to its characteristics such as no infrastructure, no center.
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