After building up the reference relationship graph, garbage collector reclaims the objects not in the graph (no longer needed), after releasing the objects not in the graph, there is memory scrap.
创建对象引用图之后，垃圾回收器将那些没有在这个图中的对象(即不再需要的对象)释放。
The commercially available memory rate can hardly keep up with the requirement of building high speed routers since the transmission capacity of the network is greatly improved.
在高速网络中，商用存储器的存取速率一直是路由器调度性能提高的制约因素。
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