标签:natural 相关文章
[00:04.78] Animals at Risk:Who Cares ? [00:07.31]动物处境危险:谁来关心? [00:09.85]An animal species becomes extinct [00:12.47]当一种动物不能在每一代 [00:15.10]when it fails to produce enough young in each generation [00:18.08]都生育出足够的后代以便
By Bill Gasperini Moscow 01 January 2006 Russia's natural gas monopoly Gazprom headquarters in Moscow, Sunday, Jan. 1, 2006 Russia began the process of cutting off natural gas supplies to neighboring
By Lisa Schlein Geneva 30 January 2006 Former President George Bush, right, with an earthquake survivor from Leepa Valley of Pakistani Kashmir during his visit to quake survivors' tented village in Is
AS IT IS 2014-03-12 Natural Gas Prices Rise in Europe as Ukraine Crisis Deepens 乌克兰冲突不断升级 推高欧洲天然气价格 Hello and welcome to As It Is from VOA Learning English! Im Mario Ritter in Washington. Today, we have two reports
SCOTT SIMON, HOST: A new study published in the journal Science finds methane emissions from U.S. oil and gas operations are 60 percent higher than previous estimates from the federal government. Now, this comes at a time when we're getting more and
A human hair consists mainly of a protein called Keratin. It also contains some moisture and the trace metals and minerals found in the rest of the body. 人类的头发主要由一种叫角朊的蛋白质组成,并含有水分及在身体其他部分