When I was a child, people generally didn't like reading, so what the teacher said in class mostly went in one ear and out the other. This sentence can also be said to be "in one ear and out the other." This view expressed by Americans is exactly the same as that expressed by China.

In English, "one ear goes in and the other ear goes out" can be expressed as "one ear goes in and the other ear goes out". Let's look at two examples:

I told Sally not to be silly and marry that man, but she went in one ear and out the other. Now she wishes she had listened to me. He drinks and gambles and she wants to leave him. I told Sally it was foolish to marry that man, but what she said to me really went in one ear and out the other. Now she regrets not listening to me. Her husband not only drinks, but also gambles. She wants to leave him.

How many times have I asked you to go to work on time? But my words just went in one ear and out the other. So I have no choice but to fire you. How many times have I told you to go to work on time? But what you said to me went in one ear and out the other. So I have to fire you.