汞齐试验

VOA慢速英语 2007 0627b

VOICE ONE: Im Steve Ember. VOICE TWO: And Im Barbara Klein with EXPLORATIONS in VOA Special English. Today we tell about a program in the nineteen sixties to train women as astronauts. Today they are known as the Mercury Thirteen. They never reached

发表于:2018-12-07 / 阅读(38) / 评论(0)

VOA慢速英语2007年（六）月

60秒科学:Mercury Fillings Seem Safer over Time

Mercury Fillings Seem Safer over Time A study in the journal Chemical Research in Toxicology finds that mercury on the surface of dental fillings slowly turns to an inert sulfide compound, which should keep the mercury from harming the nervous system

发表于:2019-01-02 / 阅读(105) / 评论(0)

60秒科学

VOA慢速英语2009-EXPLORATIONS - Project Mercury: The US Space

VOICE ONE: EXPLORATIONS -- a program in Special English by the Voice of America. (SOUND) That announcement was made May fifth, nineteen sixty-one. It was the first manned flight of project Mercury. Today, Tony Riggs and Larry West tell about the beg

发表于:2019-01-11 / 阅读(57) / 评论(0)

VOA慢速英语2009年（六）月

VOA慢速英语2013 How the 'Mercury 13' Led the Way for Women in the US Space Program

How the 'Mercury 13' Led the Way for Women in the US Space Program Im Steve Ember. And Im Barbara Klein with EXPLORATIONS in VOA Special English. Today we tell about a program in the nineteen sixties to train women as astronauts. Today they are known

发表于:2019-01-12 / 阅读(39) / 评论(0)

2013年VOA慢速英语(五)月

VOA慢速英语2013 EXPLORATIONS - How the 'Mercury 13' Led the Way for Women in the US Space Program

EXPLORATIONS - How the 'Mercury 13' Led the Way for Women in the US Space Program Im Steve Ember. And Im Barbara Klein with EXPLORATIONS in VOA Special English. Today we tell about a program in the nineteen sixties to train women as astronauts. Today

发表于:2019-01-12 / 阅读(31) / 评论(0)

2013年VOA慢速英语(四)月

英语听书《海底两万里》第171期第12章一切都用电(4)

Sodium? 钠吗？ Yes, sir. Mixed with mercury, it forms an amalgam that takes the place of zinc in Bunsen cells. 是的，先生。钠跟汞混合，成为一种合金，代替本生电池中所需要的锌。 The mercury is never depleted. Only the

发表于:2019-02-25 / 阅读(122) / 评论(0)

《海底两万里》中英双语有声读物

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