科学美国人60秒 SSS Migrating Birds Prefer Lakefront Property

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

世界小史 第191期:汪达尔人

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

SSS 2008-09-17

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

科学美国人60秒 SSS DNA Points to Multiple Migrations into the Americas

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

考研英语长难句讲解 第124期

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

散文：Dear March - Come in

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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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

VOA慢速英语2015 国际行动呼吁停止移民“幽灵船”

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

VOA标准英语2012--Study Links Flu Pandemics to La Ni?a

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

英语听力：自然百科 大迁徙之繁衍生息 Need to Breed—5

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

英语听力：自然百科 大迁徙之繁衍生息 Need to Breed—1

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

英语听力：自然百科 大迁徙 Great Migrations—5

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

英语听力：自然百科 大迁徙 Great Migrations—3

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

英语听力：自然百科 大迁徙 Great Migrations—14

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

双语有声阅读：Dear March - Come in

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

AGRICULTURE REPORT - Locusts in North Africa

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

美国学生人类历史 第161期:中世纪的城市(5)

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 第162期:中世纪的城市(6)

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 第163期:中世纪的城市(7)

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 第141期:封建制度(4)

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