单词：olefiant
colorless gaseous hydrocarbon called ethylene.
单词：olefiant 相关文章
The penguins stay when all other creatures have fled because each guards a treasurea single egg rested on the top of its feet and kept warm beneath the downy bulge of its stomach. There is no food and no water for them. And they will not see the sun
探索与发现2012年
ENVIRONMENT REPORT - November 1, 2002: Shrinking Ozone Hole over Antarctica By Cynthia Kirk This is the VOA Special English ENVIRONMENT REPORT. Australian researchers say the hole in the ozone layer o
健康与环境
By Peter Fedynsky Washington, DC 07 August 2006 watch Peacekeeping report Lebanon has been pounded by outbreaks of violence and war throughout its recent history. In 1978, following years of tension along the country's border with Israel, the United
2006年VOA标准英语（八月）
But they are hungry and eager to reach their mother whos delayed feeding them on this special day. Now she lures them with the promise of milk, the only food the cubs have known since they were born, deaf and blind beneath the snow some two months ag
探索与发现2012年
As we travel south, so the suns influence grows stronger. And at 50 degrees of latitude, a radical transformation begins. Summers here are long enough for broadleaf trees to replace conifers. Broadleaves are easier to eat and digest, so now animals c
探索与发现2012年
Deer are frequent casulties of the harsh winter. And these leopards are not above scavenging from a corpse. African leopards could never survive here. But the Russian cats have thick fur to shied them from the cold. There are only 40 Amur leopards le
探索与发现2012年