美国科学60秒 SSS 2015-02-16
时间：2019-01-20 作者：英语课 分类：2015年Scientific American(二)月
英语课
It has long been thought that mammoths and mastodons rambled 2 over North American subartic grounds between 75,000 and 10,000 years ago, and were made extinct by hungry new arrivals on the scene, human beings. But new evidence indicates mastodons probably round the region as far back as 120,000 years ago, and they were gone before the first people showed up.” For at least the story with the mastodons we now know that in what we called the beringia, Alaska part of Uncon over into northeast of Asia, they were wiped out in those areas for things they had nothing to do with humans, because they were died out before there were humans there. Park. DragonMiler, the curator of worlds science of University of Alaska museum of the north. Humans could not have been part of the story, and that’s pretty interesting. The research in proceeding 4 of National Academy of Science, Dragon Miler and Co-author were led to the conclusion after colleague at Ucon paleontology program in Canada, decide to re day nearly 40000 specimen 5, Because American mastodon are often mistaken for their much hairier wooly 6 mammoth 1 cousins, who hung around the area later. A mammoth and a mastodon can be immediately distinguished 7 on the basis of their teeth, their big cheek teeth. The surface of the mammoth tooth looks like a washboard, prefect for grinding grasses the grew during last ice age, the mastodon tooth has much lumpier, bumpier 8 cusps, ideal for chewing twigs 9 and leaves, people on the past when they found the teeth and bonds, they put glue and other kind of strange things on them, that glue can actually mess dates, it give a wrong date, and in fact give you a date too young, the new date corroborate 10 what mastodon teeth show. They ambled 3 over the Beringia. When the region were warmer and forested, long before mammoth and earlier than human, So if human didn’t wipe out mastodon, what did, that mystery remains for scientist to think their teeth into
n.长毛象；adj.长毛象似的，巨大的
- You can only undertake mammoth changes if the finances are there.资金到位的情况下方可进行重大变革。
- Building the new railroad will be a mammoth job.修建那条新铁路将是一项巨大工程。
（无目的地）漫游( ramble的过去式和过去分词 )； （喻）漫谈； 扯淡； 长篇大论
- We rambled through the woods. 我们漫步走过树林。
- She rambled on at great length but she didn't get to the heart of the matter. 她夹七夹八地说了许多话也没说到点子上。
v.（马）缓行( amble的过去式和过去分词 )；从容地走，漫步
- We ambled down to the beach. 我们漫步向海滩走去。
- The old man ambled home through the garden every evening. 那位老人每天晚上经过花园漫步回家。 来自《简明英汉词典》
n.行动，进行，(pl.)会议录，学报
- This train is now proceeding from Paris to London.这次列车从巴黎开往伦敦。
- The work is proceeding briskly.工作很有生气地进展着。
n.样本，标本
- You'll need tweezers to hold up the specimen.你要用镊子来夹这标本。
- This specimen is richly variegated in colour.这件标本上有很多颜色。
adj.毛茸茸的；糊涂的
- I like the feel of this cloth and it has a warm wooly feel.我喜欢这块布的手感,它摸上去毛茸茸的很暖和。
- He wore a brown t-shirt with jeans and a pair of shoes,with a wooly hat covering his hair.小贝身穿一件棕色t恤，搭配牛仔裤和皮鞋，头戴一顶盖住头发的羊毛帽子。
adj.卓越的，杰出的，著名的
- Elephants are distinguished from other animals by their long noses.大象以其长长的鼻子显示出与其他动物的不同。
- A banquet was given in honor of the distinguished guests.宴会是为了向贵宾们致敬而举行的。
细枝，嫩枝( twig的名词复数 )
- Some birds build nests of twigs. 一些鸟用树枝筑巢。
- Willow twigs are pliable. 柳条很软。
v.支持，证实，确定
- He looked at me anxiously,as if he hoped I'd corroborate this.他神色不安地看着我，仿佛他希望我证实地的话。
- It appeared that what he said went to corroborate my account.看来他所说的和我叙述的相符。