Okay, the user wants me to translate "chemical signals" into Arabic. Let me check the rules again. The first rule says to translate all content into Arabic. The second rule states that if the content is already in Arabic, leave it as is. The third rule is to provide only the translation without any explanations.
So, the input here is "chemical signals," which is in English. I need to translate it. The correct Arabic translation for "chemical signals" would be "الإشارات الكيميائية." I should make sure there are no typos and that the translation is accurate. Since the user specified to only output the translation, I won't add any extra text or explanations. Just the Arabic translation.
الإشارات الكيميائية
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