求高人幫忙翻譯(英文),不要在線翻譯出來的!
In 1959 the twenty-year-old Constellation was quickly made obsolete by the introduction of the Boeing 707 jet airliner, an event that marked the start of a new era of air travel. Flying typically above 30,000 feet at speeds of around 550 mph, and with a range of 7,500 miles, the 707 cut travel times for long-distance flights by several hours over its piston-engine predecessors. Because of the shorter duration of many flights, the need for full sleeping accommodations diminished, except as a luxury reserved for a shrinking number of first-class passengers, as pressure increased to pack many more economy passengers onto each flight in order to reduce their fares. The era of mass air travel had finally arrived.
請注意一下,我已經強調過了不要在線翻譯出來的東西,那種不通順的我是絕對不會采納為答案的