单词:Yours Respectfully yours
单词:Yours Respectfully yours 相关文章
THIS IS AMERICA - Another World, Underground: Carlsbad Caverns National Park in New Mexico BOB DOUGHTY: Welcome to THIS IS AMERICA in VOA Special English. I'm Bob Doughty. BARBARA KLEIN: And I'm Barbara Klein. This week on our program, we explore a U
Scientists have identified what they say is the oldest known drawing of an animal. The scientists say the red image of a bull was found on the wall of a cave on the island of Borneo. They believe the picture is at least 40,000 years old. Until a few
VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English. I'm Bob Doughty. VOICE TWO: And I'm Barbara Klein. This week on our program, we explore a UNESCO World Heritage Site in the American Southwest, near the city of Carlsbad, New Mexico. Carl
VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English. I'm Bob Doughty. VOICE TWO: And I'm Barbara Klein. This week on our program, we explore a UNESCO World Heritage Site in the American Southwest, near the city of Carlsbad, New Mexico. Carls
Another World, Underground: Carlsbad Caverns National Park 美国西南部的一处UNESCO世界遗产 Welcome to This Is America with VOA Learning English. This week on our program, we explore a UNESCO World Heritage Site in the American Southwest, n
The cave rivers course is channeled by the beds of limestone. A weakness in the rock can allow the river to increase its gradient to flow in, providing a real challenge for the cave explorers. The downward rushes halted when the water table is reache