“难度和费用翻倍，航天飞机毕竟有参考，但空天战斗机可是全新事物。”
“各种新技术都需要攻坚实验，烧钱再正常不过。”
杨总师点了点头：“你们人手够吗？一直以为你是二选一。”
“小孩在才做选择，成年人当然是全都要啦！”陆慎为半开玩笑道。
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