"西藏"被誉为"世界屋脊" 的英文翻译是 "Tibet is known as the 'Roof of the World'.".
"世界屋脊"这个说法来源于西藏地处高海拔地带，有着世界最高山峰之一的珠穆朗玛峰。而 "Roof of the World" 这个说法意味着西藏是世界的最高地带，就像一个屋顶一样。
下面是一些例句：
Tibet is known as the 'Roof of the World' due to its towering mountain peaks, including Mount Everest.
The remote, high-altitude region of Tibet is often referred to as the "Roof of the World".
With an average elevation of more than 4,000 meters, Tibet is known as the "Roof of the World" and is home to some of the tallest peaks in the world.