核心词议：
n. [古生] 乳齿象；庞然大物
adj. 巨大的；庞大的
mastodon 基本解释
n. 乳齿象，庞然大物
速记方法
知识扩展
中文词源
中文词源： mastodon
精选例句
1、 Previously the first indications of mastodon hunting were associated with the ˈClovis cultureˈ which emerged some 1,000 years later.
先前，第一个狩猎乳齿象的迹象与晚出现1000年的克劳维斯文明联系在一起。
2、 Scientists have now accurately carbon-dated the sharp tip that itself carved from mastodon bone.
如今，利用放射性碳素测定年代法，科学家已确定这一用乳齿象牙雕刻而成的长矛尖端的精确年代。
常见考点例句：
- The researchers also made what they say are the first sequences of nuclear dna from the extinct american mastodon .
- 据研究者说，他们还首次完成了已灭绝的美洲乳齿象细胞核dna序列的测定。
- The mastodon became extinct about 10000 years ago - around the same time that mammoths disappeared from most of their range .
- 美洲乳齿象在约1万年以前灭绝－几乎在同一时间猛犸象也从大多数它们分布的地方消失了。
- The researchers compared sequences of dna from the nuclei of african and asian elephants , and from woolly mammoths and the american mastodon .
- 研究人员对比了非洲象和亚洲象，以及来自猛犸象和美洲乳齿象的细胞核dna序列。
- Although mastodon mitochondrial dna has been sequenced before , the researchers say they were the first to do the analysis on dna from the cell nucleus - in this case , using material from a tooth .
- 尽管此前已完成了美洲乳齿象的线粒体dna测序，研究者表示他们还首次实现了对细胞核dna的测序－在本例中使用的材料来自牙齿。
- Crack the skye mastodon cd sealed new 2009 .
- 破解光盘密封斯凯乳齿象2009年新。
