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 ...
Environmentalists are pleased by the comeback but not by the delisting.环保人士感到高兴,但不被抛弃的除名.The report has delighted environmentalists.这份报告让环境保护主义者欢欣不已。Environmentalists say there is a high risk of pollution from the landfi...
锡辛赫斯特南面花园的布局工整对称。The south garden at Sissinghurst was composed symmetrically.大多数人的脸不对称。Most people's faces are asymmetric.花园图案的完全对称the perfect symmetry of the garden design...