The vowel with V is characterized by a round lip. That is, for the sake of pronunciation standards, the upper and lower lips are basically round or oval.
In addition, it is necessary to pay attention to distinguish the pronunciation of un temperature (different from vn)
Initial syllable: A syllable that has no initial but consists of a vowel and key signature. For example: ān (pronunciation and phonetic notation of the word "An").
Integral recognition syllables: syllables that have initials and finals, but cannot be spelled separately and need to be recognized as a whole. For example: yún (pronunciation and phonetic notation of the word "cloud").
Two phonetic syllables: syllables with initials and finals, and the basic structure is "initials-finals → syllables". For example, the pronunciation and phonetic notation of "Dan". Spell the syllables from d to an twice.
Let's look at some Chinese characters: "Jiao", "Duo" and "Quan". The phonetic notation of these words is "jiào", "du not" and "quán" respectively.
After removing the middle letters I, U and U, not only can you not pronounce these words accurately, but you can't type these Chinese characters on the keyboard with pinyin input method. In a syllable, letters such as I, U and U can play an intermediary role between initials and finals, which we call intermediary vowels. The syllable composed of initials, finals and key signature is called Sanyin Street.