aerodynamic

1. ADJ If something such as a car has an aerodynamic shape or design, it goes faster and uses less fuel than other cars because the air passes over it more easily. (汽车等) 流线型的

The secret of the machine lies in the aerodynamic shape of the one-piece, carbon-fibre frame. 该机器的秘密在于其一体式碳纤维外壳的流线型设计。