If they haven't worked abroad for a long period, or seen the changes that science and technology are making in the world, then they don't know what is the best thing to do for the development of the nation.
如果不是長期在外國工作，或是沒有看到科技的發展帶來的世界變化，就不曉得我們怎麼做對國家的發展才比較好。