Robert Forward, an engineer who used to work for Hughes Air craft, has designed a space probe that might reach the stars, not within this century but a little later.是什么意思_Robert Forward, an engineer who used to work for Hughes Air craft, has designed a space probe that might reach the stars, not within this century but a little later.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句