I wanted to improve my English pronunciation. But I just realize that I cannot understand the symbols in my English dictionaries (including some online dictionaries). There are so many, just look at this table.
My first question is for my general culture. Why are there so many? And which system is used the most?
My second question concerning a website teaching the pronunciation: http://pronuncian.com/sounds
Do you know a dictionary (including online dictionary) using the same phonetic symbols?