frequency
英 ['fri?kw(?)ns?]
美 ['frikw?nsi]
中文詞源
frequency 頻率來自frequent, 頻繁的。用于語音學名詞。
英文詞源
- 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.).
雙語例句
- 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。
來自柯林斯例句
- 2. Fatal road accidents have decreased in frequency over recent years.
- 近年來致命交通事故發(fā)生率已經(jīng)下降。
來自《權威詞典》
- 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(jiān)聽他們的談話.
來自《簡明英漢詞典》
- 4. The drug can reduce the frequency and severity of attacks.
- 這種藥能降低發(fā)病次數(shù)和嚴重程度.
來自《簡明英漢詞典》
- 5. Fatal accidents have decreased in frequency over recent years.
- 近年來死亡事故發(fā)生的頻率已經(jīng)下降.
來自《簡明英漢詞典》