| 单词 | 频率 |
| 释义 | 〔epinephrine〕A hormone secreted by the adrenal medulla that is released into the bloodstream in response to physical or mental stress, as from fear or injury. It initiates many bodily responses, including the stimulation of heart action and an increase in blood pressure, metabolic rate, and blood glucose concentration. Also called adrenaline 肾上腺素：肾上腺髓质分泌的荷尔蒙，由于肉体或精神的压力，如恐惧或受伤，而进入血液。它激发很多生理反应，包括刺激心脏活动，升高血压， 增加新陈代谢频率和血液中葡萄糖的浓度 也作 adrenaline〔heterodyne〕To combine (a radio-frequency wave) with a locally generated wave of different frequency in order to produce a new frequency equal to the sum or difference of the two.外差：把（一个无线电频率波）与另一个频率不同的局部产生的电波层混合，以产生相当于原来两个的总和或差拍的新频率〔sideband〕Either of the two bands of frequencies, one just above and one just below a carrier frequency, that result from modulation of a carrier wave.边（频）带：两个频率带之中的任何一个，一个恰好高于且另一个恰好低于载体的频率，因载体的电波调制造成的〔sound〕Vibrations transmitted through an elastic material or a solid, liquid, or gas, with frequencies in the approximate range of 20 to 20,000 hertz, capable of being detected by human organs of hearing.声音，响声：通过有弹性的物质或者固体、液体或气体传送的振动，频率在20至20,000赫兹之间，能够被人的听觉器官感觉到〔gigahertz〕A unit of frequency equal to one billion (109) hertz. Also called gigacycle ,kilomegacycle 十亿赫兹：频率单位等于十亿(109) 也作 gigacycle,kilomegacycle〔shrill〕High-pitched and piercing in tone or sound:尖声的：声调或声音的频率高并有穿透力的：〔tune〕To adjust (a receiver) to a desired frequency.调整（接收器的频率）：调谐（接收器）以达到希望的频率〔frequency〕The number of repetitions of a complete sequence of values of a periodic function per unit variation of an independent variable.频率：当自变量变化一个单位时，周期函数取同一完整数序的重复次数〔infrasound〕A wave phenomenon sharing the physical nature of sound but with a range of frequencies below that of human hearing.次声：一种波现象，它有声音的物理特性和频率又在人耳的听力范围之内〔dispersion〕Separation of a complex wave into its component parts according to a given characteristic, such as frequency or wavelength.频散；弥散：复合波根据给定特征，如频率或波长，而分成各组成部分〔midrange〕The middle part of an audio frequency.中声频，中频：声波频率的中间部分〔tachycardia〕A rapid heart rate, especially one above 100 beats per minute in an adult.心动过速：心跳频率过快症状，尤指一个成人每分钟一百次以上的心跳〔infrasonic〕Generating or using waves or vibrations with frequencies below that of audible sound.次声的：产生或使用频率低于人耳能听见的声音的波或振动的〔ultrasonic〕Of or relating to acoustic frequencies above the range audible to the human ear, or above approximately 20,000 hertz.超过人耳能听到的范围或超过大约20,000赫兹的，与超过人耳能听到的范围或超过大约20,000赫兹的声音频率有关的〔seismicity〕The frequency or magnitude of earthquake activity in a given area.地震强度：某一地区地震活动的频率或强度〔heterochromatic〕Consisting of different wavelengths or frequencies.非单一波长或频率的：由多种不同波长或频率组成的〔regular〕Having bowel movements or menstrual periods with normal or healthy frequency.恒常的：具有正常或健康的频率的肠胃运动或月经周期的〔scrambler〕An electronic device that scrambles telecommunication signals to make them unintelligible to anyone without a special receiver.扰频器：一种电子设备，用于扰乱无线电信号的频率使在无特殊仪器的情况下无法接收〔doubler〕A device that doubles the frequency or voltage of an input signal.倍压器，倍频器：将输入信号的频率或电压增强一倍的装置〔superheterodyne〕Of, relating to, or being a form of radio reception in which the frequency of an incoming radio signal is mixed with a locally generated signal and converted to an intermediate frequency in order to facilitate amplification and the rejection of unwanted signals.超外差式的：属于、关于或者是无线电接收的一种方式的，接收的无线电信号和当地发射的无线电信号的频率相混合，变成一种折衷的频率，目的在于放大或排除不要的信号〔resonator〕A hollow chamber or cavity with dimensions chosen to permit internal resonant oscillation of electromagnetic or acoustical waves of specific frequencies.共振腔：具有容积的空室或空腔，可允许在某一频率下的电磁波或声波产生内部共振振荡〔pneumotachograph〕An apparatus for recording the rate of airflow to and from the lungs.呼吸频率描记器：一种用来记录进出肺部的空气频率的仪器〔harmonic〕A wave whose frequency is a whole-number multiple of that of another.调波：一种频率是另一种波频率整数倍的谐波〔intermodulation〕Modulation of the frequencies of electromagnetic waves occurring when the waves interact as they are transmitted through a nonlinear electronic system.居中调频：当电波经由非线性电子系统传递时，电磁波交互作用所发生电磁波频率的调整〔woofer〕A loudspeaker designed to reproduce bass frequencies.低频扬声器：设计用来再现低音频率的扬声器〔dial〕A movable control knob or other device on a radio or television receiver used to change the frequency.调谐钮：收音机或电视机用来转换频率的转动控制钮或其它装置〔less〕To a smaller extent, degree, or frequency:较少地：范围、程度或频率更小地：〔octave〕The interval between any two frequencies having a ratio of 2 to 1.倍频程：频率比率为2比1的两个频率的间隔〔frequency〕The number of repetitions per unit time of a complete waveform, as of an electric current.频率：单位时间内某种完整波动的重复次数，例如电流〔synchrocyclotron〕A cyclotron that accelerates protons and positive ions by using frequency modulation to synchronize the phase of the accelerating potential with the frequency of the accelerated particles to compensate for relativistic increases in particle mass at high speeds.同步回旋加速器：一种通过运用频率调节加速质子和正离子，使正在加速的微粒与被加速核子的频率同步以弥补高速运转中相对增加的粒子质量的回旋加速器〔passband〕The range of frequencies transmitted by a bandpass filter.通带：可经由带通滤波器传输的频率〔transparent〕Permeable to electromagnetic radiation of specified frequencies, as to visible light or radio waves.可透过的：可以让某些频率的电磁辐射通过的，如可见光或无线电波〔heterodyne〕Having alternating currents of two different frequencies that are combined to produce two new frequencies, the sum and difference of the original frequencies, either of which may be used in radio or television receivers by proper tuning or filtering.外差的：由两股不同频率的交替电流联合产生两个新的频率的，原频率的总和及差拍均可通过适当调频或滤波用于无线电或电视接收〔band〕A specific range of wavelengths or frequencies of electromagnetic radiation.波段，波带：电磁辐射的波长和频率的特定范围〔cumulative〕Of or relating to the sum of the frequencies of experimentally determined values of a random variable that are less than or equal to a specified value.累积的：在一个随机变量小于或等于某个固定值的试验中求出频率总数的〔contemporary〕The animal uttered a series of low cries that seemed synchronous with its heartbeat.这只野兽发出一连串似乎与它的心跳频率一致的低吼声。〔broadband〕Of, relating to, or having a wide band of electromagnetic frequencies:宽波段的，宽频带的：属于、关于或有电磁频率宽频带的：〔regular〕Occurring with normal or healthy frequency.正常频率的：按正常或健康的频率发生的〔filter〕Any of various electric, electronic, acoustic, or optical devices used to reject signals, vibrations, or radiations of certain frequencies while passing others.滤光器，滤色镜，滤波器：一种电学的、电子学的、声学的或光学的设备，用于在通过其它物时限制特定频率的信号、振动或放射〔chaff〕Strips of metal, foil, or glass fiber with a metal content, cut into various lengths and having varying frequency responses, that are used to reflect electromagnetic energy as a radar countermeasure. These materials, usually dropped from aircraft, also can be deployed from shells or rockets.金属箔：含有金属成分的一些金属片、箔片或玻璃纤维，切割成不同长度并具有不同的反射频率，以反射电磁能来干扰雷达。这些材料通常由飞机上投下，也可布置于炮弹或火箭上 |
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