Okay, the user sent "add base". Let me check the translation rules again. The first rule says to translate all content into Thai. The second rule states that if the content is already in Thai, output it unchanged. The third rule is to provide only the translation result with no explanations.
So, "add base" is in English. I need to translate it into Thai. The translation of "add" is "เพิ่ม" and "base" is "ฐาน". So "add base" would be "เพิ่มฐาน". I should make sure there's no explanation, just the translation. Let me confirm there's no typo. Yep, looks right. Send "เพิ่มฐาน" as the response.