在世纪之交即将来临之际,世界很多国家为了争夺21世纪的战略优势,纷纷根据国际战略环境的变化提供的机遇和面临的挑战,调整和加强国防建设。 At the dawn of the turn of the century, many countries in the world, in order to compete for the strategic advantages of the 21st century, have all adjusted and strengthened their national defense in light of the opportunities and challenges they have faced in the changes of the international strategic environment.