凱萊是該領(lǐng)域主要開創(chuàng)者之一.Kelley wasone of the main pioneers in the area.馮.布勞恩 ( Wernhervon Braun,1912-1977 ) 是20世紀(jì)液體燃料火箭技術(shù)和宇航工程的開創(chuàng)者和奠基人.Wernher von Braun ( 1912 - 1977 ) was a romantic person in the field of rocket.他是心臟移植手術(shù)的開創(chuàng)者.He ...