自制火箭发射装置？
他在谈论如何解决世界能源问题的时候，让人觉得很舒服，好像是听他在讲述那个充满建筑拼装玩具和自制火箭的童年一般。
He's as comfortable talking about how to solve the world's energy problems as he is describing a childhood filled with Erector sets and homemade rockets.
他的兄弟弗莱德记得他制作过望远镜、发射过自制的火箭。
His brother Fred remembered him building telescopes and launching home-made rockets.
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