Okay, the user wants me to translate "heart sounds" into Traditional Chinese. Let me check the rules again. The first rule says to translate all content into Traditional Chinese. The second rule states that if the content is already in Traditional Chinese, leave it as is. The third rule is to provide only the translation without any explanations.
So, "heart sounds" in English translates to "心音" in Traditional Chinese. I need to make sure there's no explanation, just the translation. The user also mentioned that if the content is already in Traditional Chinese, output it unchanged. Since "heart sounds" is in English, I need to translate it. Let me confirm the translation. Yes, "心音" is the correct term for heart sounds in Traditional Chinese. I'll just output that without any extra text.