Okay, the user wants me to translate "chemical bonds" into Simplified Chinese. Let me check the rules again. The first rule says to translate all content into Simplified Chinese. The second rule states that if the content is already in Simplified Chinese, output it unchanged. The third rule is to provide only the translation result with no explanations.
So, "chemical bonds" is in English. I need to translate it. The correct translation for "chemical bonds" in Simplified Chinese is "化学键". I should make sure there's no explanation, just the translation. Let me confirm that "化学键" is the standard term used in Chinese chemistry. Yes, that's right. No need to add anything else. Just output "化学键".