...持续时间： 逻辑日志文件记录的大小 事务打开时间的长度 CPU与逻辑日志的活动级别（Actirity Level） 事务回滚的频率（Freqency） 逻辑日志记录的长度随处理操作与当前Online的环境而变化。一般来讲，数据行越长，逻辑日志记录也就越大。
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Freqency Range 电源频率 ; 额定电源工作频率 ; 输入频率 ; 电源频次
light freqency 光频率
radio freqency interference 射频干扰
freqency booster 倍频器
FREQENCY RESPONSE 频率响应
freqency cutoff 截止频率
Update freqency 更新频率
Oscillation freqency 振荡周率
Effect of low freqency vibration on solidified behavior of ferro-carbon alloy was inspected in sand-mold Casting.
本文研究了在普通砂型条件下，低频振动使铁碳合金凝固组织的影响。
The results showed that there was a better correlation between the first natural freqency( f ) and sugar contents of watermelon.
研究表明，传统的判断西瓜成熟度的含糖量与西瓜的振动基频有较好的相关关系。
The speed on line can be continuously regulated. The speed remains constant as the freqency being set up. It can save 40% energy consumption.
生产线上速度连续可调，频率设定后速度保持恒定，同时也取得了节能40％的效益。
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