We should remember the days when scientists of the older generation,such as Qian Xuesen,Li Siguang and Qian Sanqiang,developed the atomic and hydrogen bombs,satellites and many other high technologies under extremely difficult conditions.是什么意思_We should remember the days when scientists of the older generation,such as Qian Xuesen,Li Siguang and Qian Sanqiang,developed the atomic and hydrogen bombs,satellites and many other high technologies under extremely difficult conditions.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句