[English] American vowels can be summarized in this way

Summary English

Today, we will summarize all 24 American vowels. First, the Unit sound is called 【?] The pronunciation is relatively simple, and [u] [u] is a sound that I don't know very well. Not mentioned below. The following are the remaining 21 dual vowels we have summarized. Let's take a look at them. Welcome to communicate with each other.
The first set of basic unit sounds from small to large
[I] [I] [ε ]【? ] [A] Note: [I] Eat on both sides of the corner of the mouth [I] troops report sit [ε] 'Also' long ending tone bed 【?] Try to pull down the chin, baby smile, bad [a] full lock By the way:

Pay attention to the changes in the above several oral models, which are quite regular. At the same time, with the above several voices, let's [ir] [ε r] [ar ]【? R] [Ur] For example, Here Air hard born poor. After harvesting the vowels, the tongue is quickly rolled in one breath. It should be noted that the [ar] sound is affected by the tail sound R. When sending a, the mouth should not be full.

Group 2: distinguish four major and minor tongue
【?] 【?] The two voices are similar to the Chinese "ELE. Me". The former has a lighter pronunciation than the non-stressed part with more than two syllables. The latter is short, strong, and stressed. Compare ago and bus 【?] 【 ?Are respectively 【? R ]【? R. So what you understand is that these two sounds are just two volumes of tongue. For example, letter and bird do not roll tongue → light tongue? →? ? → ?Apart from the unit phoneme learning in the first two groups, we have summarized all the seven cue dual vowels. Next, let's take a look at the remaining dual vowels.
Group 3
What is best at disguise is [O] [e. It seems like a pair of vowels. [O] is actually? , U's simplified instance coat [e] is actually ε, I combined with the example make By the way:There is no need to worry about the remaining double vowels. It is a combination of unit sounds. Try to read: [I ?] [I ?] [Ai] [au ]【? I] For example, real life how boy
Learning sentimentThe above is the summary of all vowels. Thank you for your correction. This month's learning of phonetic symbols is like this.

1: Find a friend to correct the sound and you will find that you have not noticed the problem. 2: Combine word exercises. Note the differences between similar words. 3: Compare the recordings with the teacher. 4: open a camera or take a mirror, read and view it, and compare the mouth shape of yourself and the book.

All of the above is just the first step. With such a rule and method, You need to practice more if you want to make a beautiful hair that is closer to pure pronunciation. All theories are available. I need to practice well and implement it in NLP. PS: Thanks to AI and my friends

[English] American vowels can be summarized in this way