Okay, the user wants me to translate "natural sources" into Dutch. Let me check the rules again. The first rule says to translate all content into Dutch. The second rule states that if the content is already in Dutch, leave it unchanged. The third rule is to provide only the translation without any explanations.
So, "natural sources" in Dutch would be "natuurlijke bronnen". I need to make sure there's no explanation, just the translation. The user mentioned they want only the translation result. Let me confirm the Dutch translation. "Natuurlijke bronnen" is correct. No need to add anything else. Just output that.
natuurlijke bronnen
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