陈虎:美国空军于1996年提出“联合打击战斗机”这一概念,这在当时是一项惊人的计划。
Chen: in 1996, it was a big surprise when the US Air Force introduced the concept of a joint strike fighter.
陈虎:美国空军于1996年提出“联合打击战斗机”这一概念,这在当时是一项惊人的计划。
Chen: in 1996, it was a big surprise when the US Air Force introduced the concept of a joint strike fighter.
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