1. Music

In the beat, many notes are based on one beat (this is also called "unit beat"). This important time period - A beat is the basis of music, which is represented by designated notes. That is to say, various different notes, such as half notes, quarter notes, eighth notes, etc., are used as the basic beat, and then the beats are gradually stronger and weaker. Let me explain in the most popular terms what a beat is.

"Pat" in simple terms means you shoot with the palm of your hand. If you use two hands to shoot, then one photo and one close is called one photo. If you just tap it down, it is called half a photo. If you lift it up again, it is also half a photo. So it counts. One up and one down add up to one beat. (Equal to half beat plus half beat)

In Chinese opera, the beats are usually called "ban, eye", "ban" means heavy beat, and "eye" means weak beat. The way to start a beat is as follows: slap it with your palm, which is called "board", and then tap it with your index finger, which is called "eye". It is often said in Peking Opera that "three eyes are slow". What does this mean? The "three eyes" means there are three weak beats, plus one strong beat, which actually refers to the 4/4 beat. If we usually say that a person sings "nothing," it means that the person's rhythm is not good and the time is not accurate.

The tempo of music is determined according to the requirements of the music. For example, if the required speed of the music is 60 beats per minute, then each beat will occupy one-sixtieth of the time per minute, that is, One second, (a half beat is one-half second), if the specified speed is 120 beats per minute, then each beat takes up half a second (a half beat is 1/4 second), now it is half One beat per second, the former one beat per second, obviously the latter is faster than the former (we will talk about it later in the section about speed), and so on. This is also the duration of the beat. When the duration of the beat is determined, for example, when a quarter note is one beat, an eighth note is equivalent to a half beat, a whole note is equivalent to 4 beats, and a half note is equivalent to two beats. The sixteenth note is a 1/4 beat. In other words, there is one quarter note, two eighth notes, and four 16th notes in one beat. For another example, an eighth note is one beat, a quarter note is two beats, a half note is four beats, a whole note is eight beats, and a sixteenth note is half a beat. In this way, when the time value of the beat is determined, various The notes of duration are connected to the beat.

Like 2/4 beat. It is based on a quarter note, and each measure has 2 beats. It's called 2/4 time. There are two beats in a measure, the first beat is a strong beat and the second beat is a weak beat. In a measure, only one strong beat and one weak beat appear, and then they repeat each measure. This 2/4 rhythm is very suitable for use when marching in queue, so most marches adopt this 2/4 time form.

"Rat"--also called "rocker arm". The internal parts of low-end automobile engines are connected with the valves and are also called "valve rocker arms".

2. Furniture

Furniture copper accessories. The part attached to the half-page page that can be opened and closed. When closed, there are two holes that can be bent and locked for locking. It is one of the main copper decorations used on boxes.