氧燃比较低，粒子飞行速率低和熔融不足是涂层致密性和力学性能下降的主要原因；
When the oxygen fuel ratio is too low, slow particle flight speed and insufficient melt are the main reasons for the degradation of the coating compactness and mechanical properties.
但是最有说服力的证据显示：该物体既不是飞碟，也不是探空气球，而是一个代号为“莫古尔计划”的高飞行速率的、极机密的军事气球。
Yet the best evidence suggests that it was neither a flying saucer nor a weather balloon, but instead a high-altitude, top-secret military balloon dubbed Project Mogul.
应用推荐