She could have made the sandwich herself; her mum needn't have bothered to do anything...她本来可以自己做三明治的;她妈妈原本不必费心做任何事情。...a double-decker sandwich.双层三明治The vibration behaviour of sandwich structure with spring interla...
The precision estimation of RCS is very important for aerocraft stealth design.目标RCS的精确计算和预估是飞行器隐身设计极其重要的一部分.High - speed reentry aerocraft is usually with terminal guidance system.高速 再入飞行器通常具有末制导系统.So the effect of unst...
The wind was bouncing the branches of the big oak trees.一棵棵高大橡树的枝条随风摇摆。Wind turbines are large and noisy and they disfigure the landscape.风力涡轮机个头大、噪音响，还会破坏周边风景。His long, uncovered hair flew back in the wind.他那露在外面的长发随风向后...