单词:slow-type electronic analogue computer
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EXPLORATIONS - The Erie Canal Helped America Grow BOB DOUGHTY: Im Bob Doughty. MARIO RITTER: And Im Mario Ritter with EXPLORATIONS in VOA Special English. In the early eighteen hundreds, traveling in the United States was dangerous. Business and trad
We're getting you caught up today on something that's caused catastrophic damage on parts of California, wildfires. Firefighters are currently battling at least 10 of them across the state. That includes the Mendocino Complex Fire, the largest wildfi
Koalas are officially listed as at risk of disappearing in New South Wales, Australia. Now, the states government has $34-million plan to protect the beloved animals. Koalas have large, hairy ears. They have especially sharp claws, which help them cl
Invasive species get a bad rapbut we humans are usually to blame for their spread. Take Japanese stiltgrass, an invasive that arrived from Asia nearly 100 years ago as a packing material for porcelain. When it creeps into forests, it forms dense carp
THIS IS AMERICA -June 10, 2002: Biltmore Estate By Paul Thompson Broadcast: VOICE 1: It was built more than one-hundred years ago near the mountains of North Carolina. It is still the largest private
By Luke Hunt Bangkok 05 November 2009 FAO says most countries in Europe and North America have reversed centuries of deforestation As international attention shifts to Copenhagen and the coming United Nations conference on climate change, reforestat