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2013-05-23 12:21
求翻译：The brothers built their own small engine. They also built a propeller. Their plane weighed 750 pounds (340 kilograms). Its wings stretched 40 feet (12 meters) across. On December 17, 1903, Orville made the first successful flight. He stayed in the air for 12 seconds. Wilbur also made flights that day. In the last flig是什么意思？ 待解决
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The brothers built their own small engine. They also built a propeller. Their plane weighed 750 pounds (340 kilograms). Its wings stretched 40 feet (12 meters) across. On December 17, 1903, Orville made the first successful flight. He stayed in the air for 12 seconds. Wilbur also made flights that day. In the last flig
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