单词：high gravity acceleration environment
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By VOA News Bulawayo, Zimbabwe 22 October 2007 The cemeteries of Zimbabwe are filled these days with fresh graves, many of the smallest mounds covering some of what was the southern African nation's future. An opposition leader says the acres of fres
2007年VOA常速英语（十月）
1. Transportation Secretary Ray LaHood says the government will pursue questions about the electronics on Toyotas that could potentially have sudden and dangerous acceleration. The head of Toyota sales in US testified yesterday about recent Toyota re
美联社新闻一分钟2010(三月)
Worms Get Ready to Fly in Space 蠕虫准备在太空中飞行 Humans are well-equipped for life on Earth. But in space, it is a different story. Low or zero gravity changes how the blood flows and causes motion sickness, muscle loss and tiredness. W
2015年VOA慢速英语(三)月
At first, the elevator is standing still, so you and the scale are standing still. 一开始，电梯静止不动，你和体重计一样静止不动。 The two forces on you are equal and opposite. 你身上的作用力相等且相反。 You can rea
TED演讲教育篇
You step into an elevator. It starts going down fast. 你进了电梯。电梯开始快速下降。 What would happen if you jumped right when it started going down? 此时，如果你突然往上跳会发生什么事？ Would the ceiling hit your he
TED演讲教育篇
JUDY WOODRUFF: But, first, this week marks the 100th anniversary of the publication of Albert Einstein's greatest work, a series of papers laying out the general theory of relativity. Gwen has a look at how it changed our understanding of the cosmos
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