This bit rate can be approximately constant to support constant bit rate traffic or it can be highly variable to support variable bit-rate traffic.

比特率可以近似不变以支持恒定比特率业务或者高度变化以支持可变比特率业务。

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Variable bit rate (VBR) and constant bit rate (CBR).

可变比特率（VBR）和恒定比特率（CBR）。

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We then created an ATM permanent virtual circuit (PVC), assigned it to the variable bit rate non-real-time ATM service category, and configured a sustained cell rate of 6 Mbps.

我们创建了一个AT M永久虚拟电路(PVC)，然后分配了可变的速率到非实时atm服务类别，并且配置了6 Mbps的持续信元速率。

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Delinquency rates on variable-interest-rate loans to subprime borrowers, which account for a bit less than 10 percent of all mortgages outstanding, have climbed sharply in recent months.

NPR: Bernanke: U.S. Growth 'Moderate' as Inflation Rises