Smith completed two tours in Vietnam, eventual flying more than 200 ground-support missions. While on his first tour, in Vietnam, he survived an ambush that left most of his company dead. During the assault he became separated from his gun, but the managed to retrieve the weapon in time to bring down a Vietcong soldier who was about to attack him. He had also learned a valuable lesson from the war. "There're only three things you gotta remember," he said, "shoot, move, and communicate."
Home from Vietnam, Smith became fascinated by the notion that if you connected all the points of a network through a central hub, the efficiency could be enormous, whether the system involved moving packages and letters or people and planes. With an investment from his father's company, as well as a chunk of his own inheritance, Smith bought his first Das sault Falcon planes, and in 1971 formed the Federal Express Corporation.
1. separate vt. 使分离;使分开;使分居
例句：Then she would go and live with her children, happily ever after thrashing rice toseparate it from the husk. 于是，她就会去和她的儿女们生活在一起，然后幸福地打稻谷，把稻米和谷壳分开。
2. valuable adj. 有价值的;贵重的;可估价的
例句：It is suicidal pottering away valuable time. 浪费宝贵的时光等于自杀。
3. enormous adj. 庞大的，巨大的;凶暴的，极恶的
例句：And the Internet is not the only tool we have. But it has enormous potential. 互联网也不是我们所拥有的惟一工具，但它却有巨大的潜力。内容来自 听力课堂网：http://www.tingclass.net/show-9452-336343-1.html