The secret of the machine lies in the aerodynamic shape of the frame.该机器的精妙之处在于其构架呈流线型。Aerodynamic forces and moments are strictly speaking functionals of the state variables.严格说来,气动力和力矩是状态变量的泛涵.These effects appear to b...
Crepuscular , the setting sun lies lackadaisically horizon, incompact give out gentle ray slow.黄昏, 夕阳懒洋洋的卧在天边, 不紧不慢地发出暖和的射线.Bats are crepuscular creatures.蝙蝠是在黎明或黄昏时分活动的动物。Arriving home already was crepuscular, parents d...