frequency
frequency 英 [ˈfri:kwənsi] 美 [ˈfrikwənsi]
n. 频率；频繁
名词复数:frequencies
- Frequency measures how often things repeat over time. City buses often reach stops at a frequency of every 15 minutes, unless it's snowing or raining really hard. In that case, the frequency will slow.
- 请先登录
- n. 频率；频繁
-
1. Fatal road accidents have decreased in frequency over recent years.
近年来致命交通事故发生率已经下降。
-
2. The program can show us word frequency .
这个程序可给我们显示词频。
-
3. Objects like this turn up at sales with surprising frequency.
这样的东西在拍卖会上出人意料地频繁出现。
-
4. a high frequency, a low frequency
高频；低频
-
5. There are only a limited number of broadcasting frequencies.
广播频率的数量有限。
- 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.).
- 请先登录
0 个回复