During the measure course, the measure data will be affected unavoidably by all kinds of error, and the veracity of measure result will be affected.
由于测量过程中，测得的数据不可避免要受到各种随机测量误差的影响，影响到测量结果的准确性。
Whether in IP network or in the channel of wireless mobile network, error code or noise of signal and loss of data are always appear unavoidably.
但无论在IP网络还是在无线移动网络信道中，误码的产生、数据的丢失总是难以避免。
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