The scientists work for the National Snow and Ice Data Center at the University of Colorado in Boulder.

VOA: special.2009.10.27

And it's dangerous. People slip and fall on the snow because it's made of ice.

这样也很危险，人们会在雪上滑倒，因为雪里面都是冰。

I'm glad 实战 - SpeakingMax英语口语达人

The scientists work for the American space agency and the National Snow and Ice Data Center in Boulder,Colorado.

VOA: special.2009.05.05

Pure white snow and ice covered the Earth for as far as he could see.

VOA: special.2010.05.01

Walter Meier is a scientist with the National Snow and Ice Data Center.

VOA: special.2009.05.05

Generally,the color of snow and ice appears white.

VOA: special.2010.01.05

A week of snow and ice also temporarily shuttered Dublin airport and led to cancellations of planes, trains and sporting events in London and elsewhere.

VOA: standard.2010.01.10

Bob Doughty and Faith Lapidus tell about some of the winning American athletes on and off the ice and snow.

VOA: special.2010.02.26

Signs of climate change include an increase in rain when there used to be only snow, new plant life,and melting ice sheets.

VOA: special.2009.06.03

Rain,snow,ice,wind, and plant roots rubbed away at the top of the new canyon.

VOA: special.2009.10.07

Drivers must use special care because of ice and snow on the roads.

VOA: special.2009.01.07

They could see the snow-covered mountains and huge amounts of blue ice.

VOA: special.2009.12.23

But the snow does melt. Ice cold water travels down the mountains and forms several rivers -- the Gila River,the Green River, the Little Colorado,the San Juan, the Virgin and the Gunnison Rivers.

VOA: special.2010.10.27

"SnowCrystals.com is a website that is about snowflakes and snow crystals and generally ice phenomena,"

VOA: standard.2009.12.19