Still farther north, a hop, skip, and a jump from the Colorado Canyon, in the corner of the State of Wyoming, 拉多大峡谷再往北不远处是怀俄明州,在怀俄明州的西北角有块地方, is a place that looks on the map like a little

发表于:2018-12-29 / 阅读(146) / 评论(0) 分类 美国学生世界地理教材

For six months, Yellowstone endures an unrelenting winter. An ice world of hunters and hunted. But now footsteps on the slopes of a mountain herald a change in the season. The sun regains its strength.Water flows again. The race begins to recover win

发表于:2019-01-22 / 阅读(69) / 评论(0) 分类 自然百科2012年

Such plumes are not all that rare. 这样的热柱并不少见。 There are about thirty active ones on the Earth at the moment, and they are responsible for many of the world's best known islands and island chains, 眼下,地球上大约有30处活热

发表于:2019-02-25 / 阅读(75) / 评论(0) 分类 万物简史

These are volcanoes so explosive that they burst open in a single mighty rupture, leaving behind a vast subsided pit, the caldera (from a Latin word for cauldron). 这种火山的威力如此之大,它们一下子破土而出,留下一个沉降式大

发表于:2019-02-25 / 阅读(62) / 评论(0) 分类 万物简史

Lexington 莱克星顿 Ranchers v bison-huggers 农场主对战北美野牛极端保护者 What the ceaseless rows over Yellowstone National Park reveal about America 有关黄石国家公园无休止的争论,为我们揭示出美国的哪些? T

发表于:2019-03-09 / 阅读(156) / 评论(0) 分类 经济学人商业系列