单词:parabolic cylinder reflector
单词:parabolic cylinder reflector 相关文章
By Jill Moss Broadcast: July 28, 2003 This is Bill White with the VOA Special English Development Report. Millions of people around the world cook their food over a smoky fire every day. It is often d
In 1970, the Soviet Union put a laser reflector on the moon, carried by a rover. A few months later, it disappeared. Some speculated that the rover had fallen into a crater or parked in such a way as to render the reflector inaccessible. Now after 40
Gain - This is an increase in signal power, due to a boost from an electronic device. Garbage - These are unwanted characters that appear because of either incorrect settings or noise. Gate - These ar
NB: This is not a word for word transcript Yvonne: Hello, I'm Yvonne Archer, this is 6 Minute English and thanks to Alice for joining me today. Alice: Hi Yvonne. Yvonne: Hello Alice. Now recently, an artefact - a very old piece of art - which many hi
This is the VOA Special English Development Report. Millions of people around the world cook their food over a smoky fire every day. It is often difficult to find wood for the fire. People who do not have wood must spend large amounts of money on co
DEVELOPMENT REPORT – May 13, 2002: Solar Cookers By Jill Moss This is the VOA Special English Development Report. Millions of people around the world cook their food over a smoky fire every day. It