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খাদ্যক্যালরি কী?

Md. Saifur Rahman

এক কিলোগ্রাম পানি ওজন ১ ডিগ্রি সেন্টিগ্রেড বৃদ্ধি করতে যে পরিমাণ তাপের প্রয়োজন হয় তাকে ১ খাদ্য ক্যালরি বলে।

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