arr[j + 1] = arr[j]; // 元素后移
Just before dawn, in a scene that has repeated itself over thousands of years on the north coast of Peru, fishers drag boats made of bound reeds to the water’s edge and, kneeling on them, use paddles shaped from split bamboo to row out into the Pacific Ocean to catch their breakfast. A few hours later, these surfer fishers return with netfuls of their catch, riding waves on the final stretch back to the shore. From the main beach in Huanchaco – a seaside town near the city of Trujillo – the fish are taken to sell at the market or to beachfront restaurants preparing meals for tourists.
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NASA's decision to bring the crew home one month early, on Jan. 15, marked the agency's first controlled medical evacuation from the station in its 25 years of continuous operations. The incident highlighted the limits of treating complex health problems 250 miles away from Earth.，更多细节参见51吃瓜