“顽固问题”
用英语怎么说？

The primary obstacle to commercial supersonic flight over land is the sonic boom, a thunderous noise created when an aircraft travels faster than sound. Since 1973, civilian supersonic flights have been banned over the United States due to the disruptive nature of these booms. The X-59 is specifically engineered to solve this persistent issue. By utilizing a long, slender nose and a unique swept-wing design, the aircraft shapes the shockwaves to prevent them from merging. Instead of a window-rattling boom, the ground observers will only hear a quiet thump, similar to a car door closing nearby. This quiet thump is designed to be barely noticeable, transforming the relationship between supersonic speed and community comfort.

陆地上空商业超音速飞行的首要障碍是声爆，这是飞机速度超过音速时产生的雷鸣般的噪音。自1973年以来，由于这些声爆的干扰性，美国已禁止平民超音速飞行。X-59是专门设计来解决这个顽固问题的。通过利用细长的机鼻和独特的掠翼设计，飞机对冲击波进行整形以防止它们合并。地面观察者听到的将不是震耳欲聋的轰鸣声，而只是一个安静的砰砰声，类似于附近车门关闭的声音。这种安静的砰砰声被设计成几乎察觉不到，从而改变了超音速与社区舒适度之间的关系。