میلیونها سال طول میکشد که الماس طبیعی در نتیجه فشار زیاد لایه های زمین و دمای بالا...
روز: دسامبر 5, 2024
هر روزه بیش از چهل هزار بار در طی شبانه روز بر روی کره ما رعد و...
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