DWDM系统的传输质量受到线性和非线性两类效应引起的损害影响，导致光信号噪声比下降，误码率增大。
The transmission quality of DWDM system is affected by the damages from linear and nonlinear effects so the ratio of optical signal to noise is reduced and the bit error rate is increased.
我们的分析表明，明显下降发行人质量是一个更可靠的信贷市场过热的信号比快速总贷款的增长。
We show that a significant decline in issuer quality is a more reliable signal of credit market overheating than rapid aggregate credit growth.
在建设医学精品课程中，为了避免信号损失或信号质量下降，我们利用了IEEE1394技术。
In building first-class courses of medical science, we utilized IEEE1394 technology for fear the signal would be lost or weakened.
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