单词：parabolic lens
单词：parabolic lens 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
VOA2003（下）-发展与科学
Our story today is called The Diamond Lens. It was written by Fitz-James O'Brien. We will tell the story in two parts. Now, here is Maurice Joyce with part one of The Diamond Lens. When I was ten years old, one of my older cousins gave me a microscop
2018年VOA慢速英语(二)月
Our story is called The Diamond Lens. It was written by Fitz-James O'Brien. Today we will hear the second and final part of the story. Here is Maurice Joyce with part two of The Diamond Lens. When I was a child, someone gave me a microscope. I spent
2018年VOA慢速英语(三)月
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
VOA慢速英语2008年（九）月
By Greg Flakus Albuquerque, New Mexico 25 July 2007 Large scale collection of solar power arrays As the world searches for ways to produce energy without burning fossil fuel, there is increased interest in solar energy. One place associated with sola
2007年VOA标准英语（七月）
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
农业与发展