地面效应是汽车空气动力学研究的主要难点之一。
The ground effect is one of the main difficulties in road vehicle aerodynamics.
汽车风洞是进行汽车空气动力学研究的主要试验设备。
And automotive wind tunnel is a main test equipment to research automotive aerodynamics.
因而，对于隧道空气动力学效应的作用机制和其减缓措施进行深入研究是非常必要的。
Therefore, lucubration of tunnel aerodynamic effect's mechanism and corresponding alleviation measure is very necessary.
因而，对于隧道空气动力学效应的作用机制和其减缓措施进行深入研究是非常必要的。
Therefore, lucubration of tunnel aerodynamic effect's mechanism and corresponding alleviation measure is very necessary.
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