Okay, the user wants me to translate "ionic bonds" into Simplified Chinese. Let me check the rules again. Rule 1 says to translate all content into Simplified Chinese. Rule 2 says if it's already in Simplified Chinese, leave it as is. Rule 3 is to provide only the translation without explanations.
First, I need to confirm what "ionic bonds" translates to. In Chinese, "ionic bonds" are known as 离子键. Let me make sure that's the correct term. Yes, in chemistry, 离子键 is the standard translation for ionic bonds. The user might be studying chemistry or related fields, so accuracy is important here. Since the original term is in English, I need to translate it. There's no indication that the user provided it in Simplified Chinese already, so I should translate it to 离子键. I'll just output that without any extra text.