Less than a year after the first photograph appears on National Geographic, a jet-propelled diving saucer appears on the April 1960 cover.
距离国家地理第一次推出封面照不足一年，1960年4月又推出喷气式蝶形潜水器封面照。
The world's first jet-propelled aeroplane, with engine designed by Dr Von Ohain, made its first flight, at Marienehe in North Germany.
世界第一架喷气式飞机在德国北部的马里奈赫作第一次飞行。飞机引擎为冯·奥海因博士所设计。
Swiss pilot, dubbed "Fusion Man, " flew across the English Channel last year using a single jet-propelled wing.
去年，称为”聚变人“的一位瑞士飞行员用喷气引擎整体机翼飞过了英吉利海峡。
Swiss pilot, dubbed "Fusion Man, " flew across the English Channel last year using a single jet-propelled wing.
去年，称为”聚变人“的一位瑞士飞行员用喷气引擎整体机翼飞过了英吉利海峡。
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