单词：numerical contouring control (ncc)
单词：numerical contouring control (ncc) 相关文章
By Paul Sisco Washington, D.C. 29 June 2007 The American bald eagle, a national symbol since 1782, was once almost wiped out by hunters and pesticide poisoning. Today the great bird is not only surviving but thriving. Four decades after it was decla
2007年VOA标准英语（六月）
Endangered green sea turtles fight against the odds to survive in Hong Kong waters, where the government is working to rebuild turtle populations. Hong Kong, a bustling capital of commerce, may seem an unlikely place to find endangered species. But
VOA标准英语2009年(七月)
Bird-nesting in Winter Ernest Thompson Seton 冬天建鸟巢 欧尼斯特汤普森西顿 Ernest Thompson Seton has for a long time been studying birds and animals, and writing about them. 欧尼斯特汤普森西顿长期研究鸟类和动物，并对此
美国小学英语教材6
The birds have flown in from New Guinea and Japan to the north, Fiji to the east and even from the Asian mainland, thousands of kilometers away. In summer, Green Island is the most crowded destination on the Great Barrier Reef. It may look chaotic, b
自然百科2014年
WORDS AND THEIR STORIES - Couch Potato: Life as a Full-time Television WatcherBy Jill Moss Broadcast: Sunday, August 20, 2006 Now, the VOA Special English program, Words and Their Stories. Some unusua
2006年慢速英语（八）月
By Brian Wagner Washington 16 September 2009 Miami Beach is a top destination for vacationers from around the world -- not to mention a location for sea turtles laying eggs. For eons, female sea turtles have returned to the beaches where they were b
VOA标准英语2009年(九月)