After discussing the conceptions of power system average frequency and power system oscillation period.

探讨了系统平均视在频率及振荡频率的概念。

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The average frequency of evidentials is higher in English journalistic texts than that in Chinese ones.

从频率上看，英语新闻语篇中据素的使用频率高于汉语新闻。

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In 1960, American families ate out at restaurants much more often than Japanese and British families and the average frequency ratio was 1.

1960年，美国家庭每月在饭店就餐的平均次数要远远高于日本和英国家庭，三者的比例依次为每月次：1。

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Tremor Media ranked second with 804 million video ad impressions and an average frequency of 13.7 ads per users.

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Then we look at more nebulous attributes, such as country of registration, past utilization (types of flights, average lengths of flights and frequency of use), corrosion potential based on the region where it was based, importation costs and regulatory compliance, to name a few.

FORBES: What's The Best Jet For You? (Part 3)

In four out of the five districts with over 43 CFA core members, floor shininess has increased 63% and frequency of trash pickup has gone, on average, from 1 to 26 times in a day.

FORBES: Your First Year With Clean For America