Intelligible pronunciation is easily understood throughout the English-speaking world. As everyone knows, one of main aims for learning English is that we want to communicate with English native or non-natives (foreigners). An intelligible pronunciation is for sure much easier to communicate with non-native speakers.
Intelligible pronunciation helps us understand others' English. When we listen toothers' speech, we expect the pronunciation (including intonation) of the same word or ofthe same sentence will be the same or quite close. It is very difficult to believe ChineseEnglish major students can understand the word "Lotus"(pronunciation without /s/andchanging /t/ into /d/) because this pronunciation is different with his or hers.