ordinary activities such as air travel and vaccination 求翻译

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• 求高人帮忙翻译(英文),不要在线翻译出来的!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
• 1.it's time we got down to discussing the problem为什么用discussing不用discuss 谢谢~~2,in an hour,we can travel to places___would have taken our ancestors days to reach为什么要用which 顺求整句翻译3.sound waves in the air in much the same way___water waves spread on the water.为啥用as 不用that where in which之类的.顺求翻译.谢谢~
• ordinary activities such as air travel and vaccination 求翻译
• ordinary activities such as air travel and vaccination 求翻译
• 英语翻译Working air flow:150L/min · Re Start Air Flow:90 PSI 要翻译成常用单位L/min,还有这样的空压机到底是多大功率啊?非常急!有没有人会,
• Though laws have been passed to control the population growth.