However, in concrete application, there exist errors between the real and ideal signal environment, which can cause performance degradation in adaptive beam pattern.
然而，在具体应用中，实际信号环境和理想信号环境之间存在误差，会造成自适应波束性能下降。
When using reinforced-stress gauge to measure structural stresses in prestressed concrete girder bridge, there exist errors between measured values and the theoretical ones because of various factors.
采用钢弦式应力计测量预应力混凝土桥梁结构应力时，由于种种原因，将导致测试结果与理论计算结果不符。
However there still exist some errors in it.
然而，书中也存在着一些明显的错误和漏洞。
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