It's the world's largest island, but it's also the world's smallest continent.
它是世界上最大的岛屿,同时也是世界上最小的洲。
Hiking gives you time to think.
郊游可以使你有时间思考。
Shortly after this the famous H. M. S. Challenger expedition established the study of the sea-floor as a subject worthy of the most qualified physicists and geologists.