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People
Relating to public figures or personalities, celebrities or otherwise, who have made significant progress in their particular professional field, or who have helped or influenced wider society to an outstanding degree.
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頻率
Agriculture; Animal feed
1.的每秒的交變電流週期數 （示例： 60 週期每秒或每秒 60 赫茲）。 2.操作發生的時間單位的次數。頻率是所有聲音的基礎。 A 泵或電機的基本頻率等於它的速度在每秒抽分庭的數量乘以革命。 ...
