mastodon 核心詞議：
n. [古生] 乳齒象；龐然大物
adj. 巨大的；龐大的
mastodon 基本解釋
速記方法知識(shí)擴(kuò)展
中文詞源
中文詞源：
mastodon
精選例句
1、 Previously the first indications of mastodon hunting were associated with the ?Clovis culture? which emerged some 1,000 years later.
先前，第一個(gè)狩獵乳齒象的跡象與晚出現(xiàn)1000年的克勞維斯文明聯(lián)系在一起。
2、 Scientists have now accurately carbon-dated the sharp tip that itself carved from mastodon bone.
如今，利用放射性碳素測(cè)定年代法，科學(xué)家已確定這一用乳齒象牙雕刻而成的長(zhǎng)矛尖端的精確年代。
常見考點(diǎn)例句：
- The researchers also made what they say are the first sequences of nuclear dna from the extinct american mastodon .
- 據(jù)研究者說，他們還首次完成了已滅絕的美洲乳齒象細(xì)胞核dna序列的測(cè)定。
- The mastodon became extinct about 10000 years ago - around the same time that mammoths disappeared from most of their range .
- 美洲乳齒象在約1萬年以前滅絕－幾乎在同一時(shí)間猛犸象也從大多數(shù)它們分布的地方消失了。
- The researchers compared sequences of dna from the nuclei of african and asian elephants , and from woolly mammoths and the american mastodon .
- 研究人員對(duì)比了非洲象和亞洲象，以及來自猛犸象和美洲乳齒象的細(xì)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 .
- 盡管此前已完成了美洲乳齒象的線粒體dna測(cè)序，研究者表示他們還首次實(shí)現(xiàn)了對(duì)細(xì)胞核dna的測(cè)序－在本例中使用的材料來自牙齒。
- Crack the skye mastodon cd sealed new 2009 .
- 破解光盤密封斯凱乳齒象2009年新。