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. (汽車等) 流線型的

The secret of the machine lies in the aerodynamic shape of the one-piece, carbon-fibre frame. 該機器的秘密在於其一躰式碳纖維外殼的流線型設計。