frequency

英 ['fri?kw(?)ns?] 美['frikw?nsi]

CET4TEM4GRE考研CET6中低頻詞常用詞匯

復數:?frequencies;

frequency 頻率

來自frequent, 頻繁的。用于語音學名詞。

frequency (n.): 1550s, "state of being crowded" (now obsolete); 1640s, "fact of occurring often;" from Latin frequentia "an assembling in great numbers, a crowding; crowd, multitude, throng," from frequentem (see frequent). Sense in physics, "rate of recurrence," especially of a vibration, is from 1831. In radio electronics, frequency modulation (1922, abbreviated F.M.) as a system of broadcasting is distinguished from amplitude modulation (or A.M.).

1. Their instruments detected very faint radiowaves at a frequency of 3 kilohertz.: 他們的儀器檢測到一個3千赫的微弱無線電波。

2. Fatal road accidents have decreased in frequency over recent years.: 近年來致命交通事故發生率已經下降。

3. If we can know their frequency we will monitor their talking.: 如果我們知道他們的頻率,我們就能監聽他們的談話.

4. The drug can reduce the frequency and severity of attacks.: 這種藥能降低發病次數和嚴重程度.

5. Fatal accidents have decreased in frequency over recent years.: 近年來死亡事故發生的頻率已經下降.

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