Theoretically, all the above remarks and viewpoints you mentioned are quite correct. Unfortunately, however, you have not specifically studied any language other than your native English, so you cannot feel the actual communication methods that people who truly use a foreign language to communicate are most worried about and most hope for. Native speakers can blurt out even complex information instantly. However, non-native speakers (English learners) cannot instantly and correctly understand the English spoken by the other party within an extremely short time due to time constraints. Strictly speaking, it's not that they don't understand what the other person is saying at all; it's that the time is too short for them to instantly figure out the specific meaning, even if they catch all the words in their listening. This is because the habits of their native cultural thinking are very different from those of the other party. Therefore, the solution to this problem is very straightforward: When listening on site, if you don't understand, ask them to pause, have them write down what they said, or send a message to your phone, and you'll find it very easy to understand at a glance. Because you have enough time and space to analyze it correctly, and there's no pressure. You can respond after you understand it correctly (and even to be more secure, write it down for them to read out so that more native speakers can hear it... The solution to the problem is just that simple, but no one seems to have thought of it or adopted it. However, if you are researching very rigorous scientific issues or complex disputes, the above method is very reasonable and will satisfy both parties. This is a very humanized approach. But relying on listening to make people solve language problems instantly, without leaving them time and space to think, leading to their misunderstanding or failure to understand, is extremely inhumane. When it comes to language, it is a thousand times better

When it comes to language, it is a thousand times better to pause for an hour to be correctly understood than to not pause for a second but be misunderstood. Time and space are meant to serve people, not to harm them. We should say time and space is the best way to work out any difficulty issues, because time and space allows one to ponder until he use his head and find a way…