The forebody design a key issue for hypersonic airbreathing vehicle.前体设计是吸气式高超声速飞行器设计的关键之一.It would reach hypersonic speeds -- five times the speed of sound.也就是说,要使飞机达到特超音速—即音速的五倍.hypersonic aerodynamics高超音速空气动力学rarefied...
Hypersonic wind tunnels operating at very low densities were developed starting in about 1960.低密度超音速风洞大约开始发展于1960年.It would reach hypersonic speeds -- five times the speed of sound.也就是说,要使飞机达到特超音速—即音速的五倍.FEM FCT is used ...
艾伦的脸皱了起来,好像要打喷嚏。Ellen's face wrinkles as if she is about to sneeze.打喷嚏的时候眼睛会闭上。When we sneeze, our eyes close.我们打喷嚏究竟是怎么回事?What exactly happens when we sneeze?...
The probabilities of crime or victimization are higher with some situations than with others.在有些情况下,犯罪或受害的几率要相对更高。When we want something, we always have to reckon with probabilities.当我们需要某件东西时, 我们总得考虑或然性.Therefore, indiv...
The flat tall and slender head lamp headlamp is glowering likely.扁平细长的大灯像在怒目而视.Correct defective components that could hinder proper headlamp alignment.修正故障组件会干扰头灯正确校正.Yesterday, I had to change a headlamp bulb on my car...