For a young country just coming of age in the early 1800s, the discovery of Yellowstone helped define America s identity with its vast, bold landscape.是什么意思_For a young country just coming of age in the early 1800s, the discovery of Yellowstone helped define America s identity with its vast, bold landscape.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句