frequency 词态变化
复数: frequencies;
frequency 中文词源
frequency 频率来自frequent, 频繁的。用于语音学名词。
frequency 英文词源
- 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.).
frequency 英文释义
- 1. the number of occurrences within a given time period (usually 1 second);
- "the frequency of modulation was 40 cycles per second"
- 2. the ratio of the number of observations in a statistical category to the total number of observations
- 3. the number of observations in a given statistical category
frequency 双语例句
- 1. Their instruments detected very faint radiowaves at a frequency of 3 kilohertz.
- 他们的仪器检测到一个3千赫的微弱无线电波。
来自柯林斯例句
- 2. 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。
来自《权威词典》
- 3. If we can know their frequency we will monitor their talking.
- 如果我们知道他们的频率,我们就能监听他们的谈话.
来自《简明英汉词典》
- 4. The drug can reduce the frequency and severity of attacks.
- 这种药能降低发病次数和严重程度.
来自《简明英汉词典》
- 5. Fatal accidents have decreased in frequency over recent years.
- 近年来死亡事故发生的频率已经下降.
来自《简明英汉词典》
frequency 实用场景例句
- The program can show us word frequency (= how often words occur in a language) .
- 这个程序可给我们显示词频。
牛津词典
- the alarming frequency of computer errors
- 计算机出错惊人的频繁
牛津词典
- 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。
牛津词典
- a high/low frequency
- 高 / 低频
牛津词典
- a frequency band
- 频带
牛津词典
- There are only a limited number of broadcasting frequencies.
- 只有数量有限的广播频率。
牛津词典
- a society with a high/low frequency (= happening often/not very often) of stable marriages
- 婚姻稳定率高 / 低的社会
牛津词典
- 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。
牛津词典
- ...a frequency of 24 kilohertz.
- 24 千赫的频率
柯林斯高阶英语词典
- You can't hear waves of such a high frequency.
- 如此高频率的声波是无法听到的。
柯林斯高阶英语词典
- The frequency of Kara's phone calls increased rapidly...
- 卡拉的电话飞速增多。
柯林斯高阶英语词典
- The tanks broke down with increasing frequency.
- 坦克越来越频繁地熄火。
柯林斯高阶英语词典
- It gives the resonance frequency, effective electeromechanical coupling coefficients.
- 本文给出了这种换能器的共振频率 、 效机电耦合系数及实验结果.
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- If unable to contact Kun Ming Control, revert to this frequency.
- 如不能联系昆明管制, 回到这个频率.
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- For lossless digitization, the sampling rate should be at least twice the maximum frequency response.
- 我们要获得一个无损的采样, 就必须以波形最高允许频率的两倍作为采样率.
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- The results revealed mild lowering contrast sensitivity at high spatial frequency for our glaucoma patients.
- 然而特定轴度之闪光眩耀测试结果并未见明显差别.
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- Calibration System is a very important part of Radio Frequency Simulation System ( RFSS ).
- 校准系统是射频仿真系统 ( RFSS ) 的重要组成部分.
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- The computing method for natural frequency of feeding machine is introduced.
- 介绍了吐丝机固有频率的电算方法.
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- This allows the ear nerve to be tempered, frequency noise damage, there is a certain subduction.
- 这样可以让耳朵的神经得到锻炼, 对低频噪音的伤害, 有一定的消减作用.
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- Experimental results demonstrate effectiveness of scaling for invariance to the effect of transducer frequency.
- 实验结果验证了频率一致性处理方法的有效性,能够消除换能器频率对分类的影响.
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- The real part of the impedance R is a of frequency.
- 该阻抗的实部R是频率的函数.
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- Procedures realize the cyclical nature of a single frequency tone.
- 程序中实现单一频率的周期性提示音.
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- Are filters managed properly? Clean frequency, renew frequency?
- 过滤器管控是否恰当? 清洁频率, 更新频率是 多少 ?
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- Purpose: Audio frequency output amplifier.
- 用途: 音频输出放大.
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- Transistor high frequency generator, fast heating speed, high efficiency, low power consumption.
- 晶体管式高频发生器, 加热速度快, 效率高, 耗电少.
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- By vibration mechanics theory the calculating formula of natural frequency of hanging pipe water is established.
- 用振动力学推导出了管道悬空段固有频率的计算公式,管道悬空段的长度越大,其固有频率越低.
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- The principles and advantages of instantaneous frequency in wavelet domain are briefly discussed.
- 小波变换域瞬时频率分析方法是地震资料分析的重要工具.
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- Can measure frequency and cycle. 8846 A still can measure capacitance and temperature.
- 能够测量频率和周期. 8846A还能够测量电容和温度.
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- Spread spectrum has two distinct flavors: direct sequence and frequency hopping.
- 该技术有两个明显的变型: 直接顺序与跳频.
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