标签：Great Migrations 相关文章
You may have spotted V-shaped squadrons of geese heading south this fall. But for many migrantslike smaller songbirdsnighttime is the right time, when it comes to migration. Winds are gentler. And darkness helps them avoid airborne attacks. Of course
2016年Scientific American(十二)月
This period is known as the time of the Migrations. 成千上万的人是否被打死，这并不重要，而成千上万的人却随后跟上。这个时期叫民族大迁徙时期。 It was the storm that swept up the Roman empire and whirled it in
世界小史
This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? We live in a nice neighborhood. Of the galaxy, that is. The sun is about halfway toward the outer edge of the Milky Way. But the sun may have migrated vast distances t
Scientific American(九)月
DNA Points to Multiple Migrations into the Americas 美洲多次殖民迁移之谜 For more than ten thousand years, Alaska Native and Canadian First Nations people have lived along the Northwest coast of North America. Now, ancient remains have prov
2017年Scientific American(六)月
5.By 1996 foreign-born immigrations who had arrived before 1970 had a home ownership rate of 75.6 percent, higher than the 69.8 percent rate among native-born Americans. 【分析】复合句。句子主干为 foreign-born immigrations...had a home o
考研英语长难句讲解
Dear March - Come in - How glad I am - I hoped for you before - Put down your Hat - You must have walked - How out of Breath you are - Dear March, Come right up the stairs with me - I have so much to tell - I got your Letter, and the Birds - The Mapl
英语散文阅读
Environmental Refugees Could Top 50 Million by 2010 到2010年环境移民可能高达五千万 By 2010 the world may need to cope with as many as 50 million people who have fled their homeland - not
VOA2005（下）--社会新闻点评
AS IT IS 2015-01-12 International Action Urged to Stop Migrant 'Ghost Ships' 国际行动呼吁停止移民幽灵船 In the first week of January, more than 1,000 migrants had to be rescued in the Mediterranean Sea. Many were refugees from Syria. The
2015年VOA慢速英语(一)月
Study Links Flu Pandemics to La Ni?a A newly-identified link between pandemic flu and the weather phenomenon known as La Ni?a, may one day permit advance warnings of severe influenza outbreaks. Most of the time, influenza is a temporary annoyance. Bu
VOA标准英语2012年(一月)
Blood runs freely from slashed noses and necks. They even fight dirty, going for the eyes. The loser's breeding chances for now are ground into the sand. But this beachmaster's triumph is just the beginning of his troubles. Ahead lie dozens of fights
自然百科2011年
They are driven to move, to move and to multiply. Possessed by the /insatiable need to breed, they will journey to brutal African battle fields, and grow on South Atlantic shores. For the sake of their young, they will blacken the skies, and terroriz
自然百科2011年
It's a brutal, month-long migration, up to 5 miles, an ultra-marathon for a crab. The cruel sun makes its appearance, threatening them with dehydration. And they face a gauntlet of roads, crisscrossing the island. They stop only to nourish themselves
自然百科2010年
Apprentice killers wait for their taste of the chase. But they're about to learn that hell has no fury like a zebra protecting her foal. Older cheetahs know the value of patience. Soon, the herd will move on. Hungry eyes turn to one of the last-born
自然百科2010年
Many will drown in their frenzy to launch their eggs seaward. Most years, only a handful of their offspring survive. But sometimes, if wind and sea and luck are with them, a tidal wave of tiny crablings will return to these shores. There is no way to
自然百科2010年
Dear March - Come in - How glad I am - I hoped for you before - Put down your Hat - You must have walked - How out of Breath you are - Dear March, Come right up the stairs with me - I have so much to tell - I got your Letter, and the Birds - The Mapl
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AGRICULTURE REPORT - Locusts in North Africa By Mario Ritter Broadcast: Tuesday, August 03, 2004 This is Steve Ember with the VOA Special English Agriculture Report. Crop damage in Mauritania. An inva
农业与发展
No, the progress of the last six hundred years would not have been possible without the existence of cities. 不过，如果不是因为城市的存在，过去六百年来的进步将是完全不可能的。 I shall, therefore, have to make this cha
美国学生人类历史
You have seen how a few artisans(butchers and bakers and an occasional candle-stick maker) 后来出现了一些手工匠人，屠夫呀、面包师傅呀、制蜡烛工人呀， came to live near the castle to tend to the wants of their masters and
美国学生人类历史
Soon certain energetic merchants discovered that the goods which they had always imported from afar could be made at home. 不久，某些精明能干的商人开始意识到，那些一直从远方采购来的商品其实也可以就近生产的。
美国学生人类历史
He looked after the dikes so that the countryside should not be flooded 他还担当着照看水坝的职责，以免四周的乡野受洪水之患 (just as the first noblemen had done in the valley of the Nile four thousand years before). （就像4
美国学生人类历史