| 释义 |
beats
beat B0138200 (bēt)v. beat, beat·en (bēt′n) or beat, beat·ing, beats v.tr.1. a. To strike repeatedly.b. To subject to repeated beatings or physical abuse; batter.c. To punish by hitting or whipping; flog.2. a. To strike against repeatedly and with force; pound: waves beating the shore.b. To flap (wings, for example).c. To strike so as to produce music or a signal: beat a drum.d. Music To mark or count (time or rhythm), especially with the hands or with a baton.3. a. To shape or break by repeated blows; forge: beat the glowing metal into a dagger.b. To make by pounding or trampling: beat a path through the jungle.4. To mix rapidly with a utensil: beat two eggs in a bowl.5. a. To defeat or subdue, as in a contest. See Synonyms at defeat.b. To force to withdraw or retreat: beat back the enemy.c. To dislodge from a position: I beat him down to a lower price.6. Informal To be superior to or better than: Riding beats walking.7. Slang To perplex or baffle: It beats me; I don't know the answer.8. Informal a. To avoid or counter the effects of, often by thinking ahead; circumvent: beat the traffic.b. To arrive or finish before (another): We beat you home by five minutes.c. To deprive, as by craft or ability: He beat me out of 20 dollars with his latest scheme.9. Physics To cause a reference wave to combine with (a second wave) so that the frequency of the second wave can be studied through time variations in the amplitude of the combination.v.intr.1. To inflict repeated blows.2. To pulsate; throb.3. a. To emit sound when struck: The gong beat thunderously.b. To strike a drum.4. To flap repeatedly.5. To shine or glare intensely: The sun beat down on us all day.6. To fall in torrents: The rain beat on the roof.7. To hunt through woods or underbrush in search of game.8. Nautical To sail upwind by tacking repeatedly.n.1. A stroke or blow, especially one that produces a sound or serves as a signal.2. A pulsation or throb.3. Physics A variation in the amplitude of a wave, especially that which results from the superpositioning of two or more waves of different frequencies. When sound waves are combined, the beat is heard as a pulsation in the sound.4. Music a. A steady succession of units of rhythm.b. A gesture used by a conductor to indicate such a unit.5. A pattern of stress that produces the rhythm of verse.6. A variable unit of time measuring a pause taken by an actor, as for dramatic effect.7. a. The area regularly covered by a reporter, a police officer, or a sentry: television's culture beat.b. The reporting of a news item obtained ahead of one's competitors.8. often Beat A member of the Beat Generation.adj.1. Informal Worn-out; fatigued.2. often Beat Of or relating to the Beat Generation.Phrasal Verbs: beat off1. To drive away.2. Vulgar Slang To masturbate. beat out Baseball To reach base safely on (a bunt or ground ball) when a putout is attempted.Idioms: beat all To be impressive or amazing. Often used in negative conditional constructions: If that doesn't beat all! beat a retreat To make a hasty withdrawal.beat around/about the bush To fail to confront a subject directly. beat it Slang To leave hurriedly. beat the bushes To make an exhaustive search.beat the drum/drums To give enthusiastic public support or promotion: a politician who beats the drum for liberalism. beat up on1. To attack physically.2. To criticize or scold harshly. to beat the band To an extreme degree.
[Middle English beten, from Old English bēaten; see bhau- in Indo-European roots.]Synonyms: beat, batter1, buffet2, hammer, pound2, pummel, thrash
These verbs mean to hit heavily and repeatedly with violent blows: beat each other with sticks; a ship battered by storm waves; buffeted him with her open palm; hammered his opponent with his fists; troops pounded by mortar fire; pummeled the bully soundly; dolphins thrashing the water with their tails. See Also Synonyms at defeat.Thesaurus| Noun | 1. |  beats - a United States youth subculture of the 1950s; rejected possessions or regular work or traditional dress; for communal living and psychedelic drugs and anarchism; favored modern forms of jazz (e.g., bebop)beat generation, beatniksyouth subculture - a minority youth culture whose distinctiveness depended largely on the social class and ethnic background of its members; often characterized by its adoption of a particular music genrebeatnik, beat - a member of the beat generation; a nonconformist in dress and behavior |
TranslationsIdiomsSeebeatBeats
Beats vibrations with a periodically changing amplitude resulting from the superposition of two harmonic oscillations with slightly different, but close, frequencies. Beats arise as a consequence of the fact that the phase difference between two vibrations with different frequencies is constantly varying such that both vibrations are in phase at one moment, after some period of time are out of phase, are then again in phase, and so on. If A1 and A2 are the amplitudes of two superposed vibrations, then, given identical vibration phases, the amplitude of the resulting vibration reaches its greatest magnitude, A1 + A 2; when the vibration phases are opposite, the resulting vibration amplitude falls to its lowest magnitude, A1 - A2. In the simplest case, when the amplitudes of both vibrations are equal, their sum reaches the magnitude of 2A, given identical vibration phases, and falls to zero when they are in opposing phases. The result of superposing the vibrations can be written as 
where ω1 and ω2 are the respective angular frequencies of two superposed harmonic vibrations. (The initial phases of both vibrations are postulated to be equal to zero, as they do not play a role in forming the beats; a role is played only by the difference in phase between both vibrations, and this difference always varies between 0 and 2π.) If ω1 and ω2 differ slightly, then in expression (1) the value 
can be considered as the slowly changing amplitude of the vibration 
The angular frequency Ω = ω1 – ω2 is called the angular frequency of the beats. That is, as long as the frequency ω1 + ω2 is much greater than the frequency of the beats, the variable magnitude (2) can rightly be considered as the vibration amplitude (3), since magnitude (2), although not constant (as an amplitude should be), changes only slowly. As frequencies ω1 and ω2 become closer, the vibration frequency decreases, disappearing when ω1→ω2 (“zero” beats); this principle is used in tuning musical instruments. In radio technology a heterodyne receiver is called a beat receiver. The essence of such a receiver is that if two harmonic vibrations are fed into a nonlinear element (detector), then a harmonic vibration is obtained with a difference frequency Ω. Since the difference frequency is much lower than the frequency of the received vibrations, it can be perceived as sound at several frequency correlations. Determining the frequency of a beat tone between a measured and standard vibration is one of the more precise methods for comparing the measured magnitude with the standard and is widely used in practice. With the aid of beats it is possible to discover the most minute differences in frequency; for this reason, the “beat method” is used in various devices for measuring frequencies, capacity, inductivity, and the like. REFERENCEGorelik, G. S. Kolebaniia i volny, 2nd ed. Moscow, 1959.S. E. KHAIKIN BEATS
| Acronym | Definition |
|---|
| BEATS➣Better Ethnic Access to Services (Australia; service provider resource publication) |
beats
Related to beats: BoseSynonyms for beatsnoun a United States youth subculture of the 1950sSynonymsRelated Words- youth subculture
- beatnik
- beat
|