DB9的近义词

If you want to be extra safe, then you should also make a backup copy of your DB.

要是你想成为分外的安全，那末你也应该让您的数值库的备份打补丁副本。

Simulations for bit-error-rate on an additive white gaussian noise channel showed that at the threshold of visibility the required E_b/ N_0 was only 3.4 dB, which is 1.8 dB better than the reference schemes.

在加性高斯白噪声信道下的误码率性能仿真证明：在视觉门限下该方案所需的比特信噪比Eb/N0仅为3.4dB，比参考方案有约1.8dB的增益。

The incidences of average threshold shift more than 15 dB were 11.4% ( 5/ 44 cases) and 33.3% ( 8/ 24 cases) in the control group and the cases before 1995, respectively.

平均骨导听力损失大于15dB的发生率分别为33.3%（8/24例）和11.4%（5/44例），差异显著。