The star net structure is not very reliable, the whole net system will paralyze when some thing is wrong with the centerjoint.
星型网结构的可靠性低，当中心节点发生故障时会造成整个网络系统瘫痪；
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Our joint clean energy Research Center is funding new approaches to energy efficiency, clean coal — which we both need to deal with — and clean vehicles.
On a more "macro" level, I recently reached out to colleagues at the ec's Joint Research Center (JRC) to leverage their automated sentiment (" mood ") analysis platform.