Having the checkpoints occur at this high a frequency minimizes the number of dirty pages that must be transferred and also minimizes the buffering cost for network and storage frames.
让检查点以如此之高的频率出现，不但可以让必须传输的脏页面的数量降至最低，而且还最大限度地降低网络与存储帧的缓存成本。
The pulling frequecncy needs to be high to ensure high data accuracy, but high pulling frequency may induce redundant checks leading to high network traffic.
这种拉取 方式的频率要足够高才能保证很高的数据精确度，但高频率可能会导致多余的检查，从而导致较高的网络流量。
As we travelled, we used a high-frequency radio network to talk to the tribes as we approached, so we could ask their permission to come through.
我们在旅行中用高频无线电与当地部族联系，请求他们准许我们通过。
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