Based upon the growth layer groups in cementum and dentine of the tooth, the age of the huge Sperm Whale was estimated at 29 years.
根据对牙齿磨片牙骨质和牙齿齿质上的生长层组判断，其年龄约为2 9龄。
Based upon the growth layer groups in cementum and dentine of the tooth, the age of the huge Sperm Whale was estimated at 29 years.
根据对牙齿磨片牙骨质和牙齿齿质上的生长层组判断，其年龄约为2 9龄。
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