Interpret this idiom in context: He decided to throw in the towel after failing the exam three times.

Người đó đã quyết định bỏ cuộc sau khi thất bại trong kỳ thi ba lần. In this context, "to throw in the towel" is an idiom that means to give up or quit trying, often because you feel that you can't succeed or because you're too tired or frustrated to continue.