活化漂白土, 活性漂白土

PBS高端访谈:PBS新纪录片"Earth:The Operator's Manual"

JUDY WOODRUFF: Finally tonight: Yesterday was Earth Day, with celebrations around the globe. Hari Sreenivasan talked recently to a geologist who is also the host of a new film. And he's traveled the globe looking for ways human ingenuity has solved t

发表于:2018-12-31 / 阅读(30) / 评论(0)

PBS访谈环境系列

名人轶事:Buckminster Fuller,1895-1983:Building Designer,

Buckminster Fuller, 1895-1983: Building Designer, Engineer, Inventor, Thinker, Poet He was one of the most unusual thinkers of the twentieth century. VOICE ONE: I'm Phoebe Zimmermann. VOICE TWO: And I'm Steve Ember with the VOA Special English progra

发表于:2019-01-02 / 阅读(98) / 评论(0)

名人轶事

VOA慢速英语 2007 0114

VOICE ONE: I'm Phoebe Zimmermann. VOICE TWO: And I'm Steve Ember with the VOA Special English program People in America. Today we tell about an unusual man who had many abilities. (MUSIC) VOICE ONE: R. Buckminster Fuller Building designer. Engineer.

发表于:2019-01-11 / 阅读(47) / 评论(0)

VOA慢速英语2007年（一）月

60秒科学:Earth's Fried Far-Future Postponed

Earth's Fried Far-Future Postponed A study in the Proceedings of the National Academy of Sciences adds at least a billion years to the already far-future estimate of when the sun will make Earth too hot to handle. Karen Hopkin reports. [The followin

发表于:2019-01-30 / 阅读(71) / 评论(0)

60秒科学

60秒科学:Amygdala's Acidic Aspiration Answer

Amygdala's Acidic Aspiration Answer A study in the journal Cell shows that the buildup of carbon dioxide when we stop breathing causes a pH change that signals proteins in the brain to force us to inhale. Karen Hopkin reports. Maybe its happened to y

发表于:2019-01-30 / 阅读(143) / 评论(0)

60秒科学

China's rare earth policy justified: spokesman

BEIJING, March 15 (Xinhua) -- China's restrictions on rare earth exports are justified and are in line with World Trade Organization rules, Shen Danyang, spokesman for the Ministry of Commerce, said Thursday. The policy aims to protect resources and

发表于:2019-02-08 / 阅读(42) / 评论(0)

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学英语单词

-loger

absolute poverty line

abuse of credit

adrenergic amine

air cushions

alligator pipe wrench

amideast

amiota (amiota) dentata

annulariids

anticipater

APHS