Okay, the user wants me to translate "one-hitter" into Korean. Let me think about the possible meanings of this term. "One-hitter" can refer to a baseball player who hits a home run in their first at-bat, or it can mean someone who achieves success in a single attempt. In Korean, the common translation for a home run is "홈런". So, "one-hitter" in the context of baseball would be "홈런을 한 번에 친 선수" or more naturally, "한 번에 홈런을 친 선수". However, if it's used more generally, like someone who succeeds on their first try, it might be "한 번에 성공한 사람" or "첫 시도에 성공한 사람". But since the user didn't specify the context, I should consider the most common usage. In baseball terminology, "한 번에 홈런을 친 선수" is accurate. Alternatively, there's a term "한 타 홈런" which is a direct translation. Wait, "한 타 홈런" is more concise and commonly used in Korean baseball contexts. So the best translation would be "한 타 홈런" or "한 번에 홈런을 친 선수". Let me check if there's a standard term. Yes, "한 타 홈런" is the standard term used in Korean baseball. So I'll go with that.