The hot air permitted higher speeds before the critical Mach number was exceeded.热空气可使之在超过临界马赫数之前达到更快的速度。The aim is to fly at about Mach 2, twice the speed of sound.目标是以大约2马赫的速度飞行，也就是音速的两倍。Empirical results are needed in...
The hot air permitted higher speeds before the critical Mach number was exceeded.热空气可使之在超过临界马赫数之前达到更快的速度。The hot air permitted higher speeds before the critical Mach number was exceeded...热空气可使之在超过临界马赫数之前达到更快的速度。The aim ...
我们通常认为气体是可压缩的, 液体是不可压缩的.We frequently regard gases as compressible, liquids as incompressible.现在我们对于不可压缩的材料来研究同样的问题.We now study the same problem for the incompressible materials.中子星是压缩的最终产物 吗 ?Does a neutron star repres...
加速度和速度都是矢量。Acceleration and velocity are both vectors.我们将用惯性矢量来定义惯性标量.Inertia scalars are defined in terms of quantities called inertia vectors.仅由两个矢量组成的力偶叫作简单力偶.A couple consisting of only two vectors is called a simple...
...a frilled shirt and floppy cravat.带褶边的衬衣和耷拉的领结Double medium blue frilled star. Medium - dark green, pointed, serrated. Large.重瓣中蓝色波折星型花. 中到深绿色尖型叶, 锯齿叶缘.大型.Semidouble dark blue - purple frilled Large. Variegated dark g...
The barkeeper cold - cocked the drunk from behind and the bouncer carried him out.酒吧店主从背后将醉汉打昏后,酒店保镖把他抬了出去.That dog is a bouncer.那条狗长得特别大.The disco bouncer threw out four drunk teenagers.迪斯科舞厅的保镖把四个酒醉的青少年赶出去.The baby is ...
A child may not differentiate between his imagination and the real world.儿童可能无法将自己的幻想与真实世界区分开来。It's difficult to differentiate between the two varieties.这两个品种很难辨别。You can differentiate between the houses by the shap...