Getting back to diamonds, natural diamonds have been formed very slowly underground out of carbon under high pressure (3.6 million atmospheres) and at high temperature (6000 ° C).
再回到鑽石，天然鑽石是碳元素在地底超高壓、高溫（360 萬大氣壓、攝氏 6000 度）下、歷經十幾億年的時間，慢慢形成的。