美国军事专家正研制一种“聪明子弹”,这种先进子弹在发射后能自行追踪其袭击目标,直至命中为止。“聪明子弹“全名为“枪管发射的全天候子弹”,由激光束导向,飞行速度为超音速。这种新式子弹能利用内置微型电压棒和借助气流,灵活、精确和迅速地自行改变飞行时的方向和高度,直至追踪和命中目 U.S. military experts are developing a “smart bullet” that can track its targets after it launches, until it hits. The full name of the “smart bullet” is “a round-the-air bullet fired by a barrel,” guided by a laser beam and flying at supersonic speed. This new type of bullet can use the built-in miniature voltage rod and with the help of airflow, flexible, accurate and rapid change in the direction and height of flight until the track and hit head