Based on average S/N ratio of each sub band, the mobile station feeds back the word of data rate control (DRC) obtained by looking up the table.

系统采用闭环反馈方法，移动台根据每个子带的平均信噪比查表得到数据速率控制字DRC进行反馈；

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The Centers for Disease Control and Prevention released data recently showing that in 2009 the preterm birth rate declined, for the third year in a row, to 12.18 percent of all births.

疾病控制和预防中心最近发布的资料表明近三年来早产的比例连续在下降并在2009年下降到占总出生率的12.18%。

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Flow limits control the rate and duration for each data flow.

数据流限制控制每一个数据流的速率和持续时间。

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