单词：Drysdale ac polar potentiometer
单词：Drysdale ac polar potentiometer 相关文章
A new study has found that the Arctic's iconic polar bears are finding it harder to hunt for food due to melting sea ice caused by climate change, putting the species at a growing risk of extinction. Researchers from the United States Geological Surv
2018CRI中国国际广播电台
When the Arctic Ocean freezes over in the autumn, polar bears set off in search of their favorite meals: fatty ringed seals and bearded seals. By the summer, the sea ice begins to melt and break apart. Deprived of access to the tasty seals, polar bea
2016年Scientific American(十)月
新编英语教程第四册unit02_2_Overcoming_Procrastination_A_Prac
新编大学英语阅读部分
THE PRESIDENT: Thanks for coming. Please be seated. Welcome to the White House. And it is fitting that we use the East Garden because, one, this is rarely used; and two, it is an opportunity for me to welcome a lot of people to the -- that are here
美国总统每日发言
Seventy-nine degrees north latitude is near the top, at the cold edge of the world. In the winter, when temperatures plunge below freezing, there is complete darkness at noon. During summer, the sun shines at midnight, there is no place to hide. Dang
国家地理2007年
She worries a lot. She worries about polar bears. They are big, white bears. They live in the north. They need snow. They need ice. They need cold weather. There is too much pollution. Pollution heats up the Earth. Heat melts the ice. The ice is the
儿童英语小故事
By Katy Migiro Nairobi 02 May 2007 Ethiopia tops a list of countries where press freedom has deteriorated over the last five years, the Committee to Protect Journalists reports. The U.S.-based media advocacy group says the Ethiopian government has ja
2007年VOA标准英语（五月）
AS IT IS 2016-07-10 Asian Countries Worry About Protectionism 亚洲国家忧心贸易保护主义 Asian countries are increasingly concerned that popular anger in the U.S. and Europe might hurt their exports and lead to a global economic slowdown. 亚
2016年VOA慢速英语(七)月
By Alisha Ryu Nairobi 21 February 2007 International aid agencies are expressing frustration and alarm at their lack of access to several needy regions of Somalia because of continuing insecurity. VOA Correspondent Alisha Ryu in our East Africa Bure
2007年VOA标准英语（二月）
BBC Learning English Weekender Polar Explorer Amber: Hello, I'm Amber, and youre listening to bbclearningenglish.com. In Weekender today, we listen to an interview with explorer, Rosie Stancer. In March, Rosie sets off on her latest expedition walki
Weekender
By Benjamin Sand Islamabad 06 March 2006 Maroufa, 4, receives polio vaccination in Kabul, Afghanistan, Sunday, March. 5, 2006 Afghan volunteers are vaccinating millions of children in a nationwide ant
2006年VOA标准英语（三月）
ROME, Nov. 19 (Xinhua) -- AC Milan could not capitalise on their domination as they were held to a 0-0 draw by hosts Fiorentina on Saturday. Milan, coming off five consecutive Serie A victories, had the stronger start and penalty appeals on seven min
英语新闻
STOCKHOLM, May 8 (Xinhua) -- The 2012 Swedish Polar Music Prize was awarded to the American singer-songwriter Paul Simon and the Chinese American cellist Yo-Yo Ma, the prize committee said in a statement on Tuesday. For five decades, Paul Simon has b
英语新闻
Voice 1 Thank you for joining us for todays Spotlight. Im Rebekah Schipper. Voice 2 And Im Joshua Leo. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 Sib
环球英语 Spotlight
The dogsled skimmed silently over the frozentundra. The seal hunter ran alongside it. Sometimeshe cracked his whip against the ice. The snowdrifts looked like giant white sculptures asthe sun slipped behind the frozen hills. Then a fullorange moon ro
汪培珽儿童英文分级书单《神奇树屋》
The dogs were barking wildly at two smallcreatures playing in the moonlight. Polar bear babies! cried Annie. One roly-poly cub leaped onto the other. Then theyboth rolled through the snow. Hi, little bears! Annie called. The cubs jumped up and shook
汪培珽儿童英文分级书单《神奇树屋》
The cubs whimpered louder. They want to go to her, but they're afraid of theice, whispered Jack. Annie petted the cubs. Don't be afraid, she told them. You'll get back toyour mother.The big polar bear growled. She paced back andforth, sniffing the ai
汪培珽儿童英文分级书单《神奇树屋》
Jack, you can get up now, said Annie. Jack opened his eyes. Annie was standing over him. She still had her mask on. We're on safe ground, she said. Jack felt as if he'd been dreaming. He lookedaround. They had reached the tundra at the edge ofthe fro
汪培珽儿童英文分级书单《神奇树屋》
BEIJING, June 21 (Xinhua) -- China will launch a new icebreaker for use during an upcoming 2013 polar expedition, a senior oceanic official said on Tuesday. Both the new icebreaker and Xuelong (Snow Dragon), an icebreaker that operated in Antarctica,
英语新闻
Voice 1 Hello, Im Marina Santee. Voice 2 And Im Ruby Jones. Welcome to Spotlight. This programme uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 A tall man stands s
环球英语 Spotlight