单词：liquid waste area sump
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William Boynton is professor of planetary sciences at the University of Arizona. And he's dedicated his life to looking for water on Mars. The link between life and water is very strong. Even here in
火星生命
Last time we talked about how astronauts eat and drink under weightless conditions in space. Today we'll cover the next question kids love to ask-how do astronauts go to the bathroom in space? It may sound silly, but it's really a good question, beca
英语时差8，16
It may sound silly, but its really a good question, because weightlessness does make a visit to the latrine a tricky proposition. Weightlessness poses two main problems in the bathroom. The first is that an astronaut could drift away from the bowl at
英语听力文摘 English Digest
ENVIRONMENT REPORT -January 25, 2002: Nuclear Waste By Jerilyn Watson Yucca Mountain Range (Photo -Energy Department) This is the VOA Special English Environment Report. The United States Energy Depar
健康与环境
Everglades National Park: 'The Liquid Heart of Florida' Today on our national parks journey, we explore the Everglades in South Florida. When many people think of Florida, images of sandy coasts, theme parks and rocket launches come to mind. But it i
2016年VOA慢速英语(六)月
Questions Remain on Ebola Waste Disposal 埃博拉的废物处理费问题 Ebola is contracted by coming into contact with the bodily fluids of an infected person. Health workers wear spacesuit-like protective gear when treating patients. But researc
VOA标准英语2014年(十二月)