U has several pronunciations in phonetic symbols.
1. The vowel letter u is stressed in a closed syllable/? The voice of
Grandson, umbrella, gun, nuts and walnuts, bus, bus, uncle, uncle.
2. In stressed and relatively open syllables, the vowel letter U is pronounced with the long vowel /ju/. For example:
Tone, mute, mute, nude, mule, cube, giant, tube test tube, duke.
3. The letter combination oo is pronounced with the long vowel /u/ in most cases, for example:
School, idiot, zoo.
4. letters o, u; The letter combinations ew, ui, OE and ou are pronounced/? /,for example:
Failure, film proof, public opinion pollution, rules and regulations, rulers.
Voice function
The International Phonetic Alphabet strictly stipulates the principle of "one symbol and one sound", that is, "one phoneme, one symbol and one phoneme" is an essential pronunciation method for reading English words well.
In languages that use pinyin schemes, the same letter usually has several pronunciations in different words. For example, the "I" in English like and lit is phonetic with international phonetic symbols, which are [a? ] and [e], for example, A in bān (category) and bāng (modality) in Mandarin are [a] and [e] in the international phonetic alphabet respectively.
In addition, the same sound has different spellings in different languages. For example, English sh, French ch, German sch, Polish sz and Czech S are all international phonetic symbols [? ] sound.
These are the advantages of international phonetic symbols, that is, they can record and distinguish sounds more scientifically and accurately (there are 72 consonants and 32 vowels in general phonetic symbols, which is roughly enough for phonetic symbols). The arrangement of international phonetic symbols is easy to analyze and master (consonants are roughly located according to the pronunciation position and method, and vowels are located according to the position of the tongue).
(Reference:
Baidu Encyclopedia-Public Phonetic Alphabet)