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IELTS BNC: 2406 COCA: 3009
frequency
/ˈfri:kwənsi ||; ˈfrikwənsɪ/noun (plural frequencies)
1 [U] the number of times sth happens in a particular period 频率（在特定时间内某种事情发生的次数）: Fatal accidents have decreased in frequency in recent years. 近几年死亡事故发生的频率已经下降。
2 [U] the fact that sth happens often 频繁: The frequency of child deaths from cancer near the nuclear power station is being investigated. 在核电厂附近地区，经常有儿童死于癌症，有关当局对这个现象正在进行调查。
3 [C,U] the rate at which a sound wave or radio wave moves up and down (vibrates) 频率（声波或无线电波振动的次数）: high-frequency/low-frequency sounds 高╱低频声 ☞picture at wavelength 见wavelength插图
IELTS BNC: 2406 COCA: 3009
frequency/ˋfrikwənsI; ˈfriːkwənsi/ n plural frequencies 1 [U] the number of times that something happens 发生率﹐出现率: +of The frequency of his asthma attacks was increasing. 他的哮喘发病越来越频繁。He misses school with alarming frequency (=very often). 他频频缺课。 2 [C,U] the number of radio waves or sound waves that go past a point each second〔无线电波或声波的〕频率: sounds of very high frequency 频率非常高的声音
IELTS BNC: 2406 COCA: 3009

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