所有这些任务的另一个共同之处是，都不是灾难性的故障，不过却都是多年来逐渐积累起来的。
The other common aspect of all these assignments was that they were not catastrophic failures, but had developed gradually over the years.
SDH传输网络是一个复杂的网络系统，维护人员必须在实践中不断积累经验，提高网络故障的处理能力。
SDH transmission network is a complicated network system, the attendant should accumulate experience and steadily improve fault treatment ability for keeping the network to running normally.
由于采用相邻的两圈预测下一圈的温度分布，因此可以作为卫星热故障诊断的依据，避免了误差的积累。
Temperature distribution predicted by last two circles can be the basis on thermal fault diagnosis for satellites. Meanwhile the error accumulation can be avoided.
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