分级路由选择

For example, the routing with inaccurate information under the hierarchical structure has no uniform standard, which is the hotspot and the difficulty of network technology research, is one of the bottlenecks that constrain the development of communication technology.

在分级结构下根据非精确信息的路由选择就没有统一的标准，分级选路是当前研究的热点也是很大的难点，是约束通信技术发展的瓶颈之一。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。