array(4) { [0]=> string(78) "大气和太空飞行动力学[pdf+matlab]\(Modeling and Simulation in Science" [1]=> string(168) " Engineering and Technology) Ashish Tewari - Atmospheric and Space Flight Dynamics_ Modeling and Simulation with MATLAB_ and Simulink_ (Modeling and Simulation in S.pdf" [2]=> string(8) " 8818998" [3]=> string(21) " 2020-10-01 11:05:2 " }