By design, the plane is to be more economical in terms of fuel consumption compared to previous versions of passenger planes.
By design, [M]the plane is to be more economical in terms of fuel consumption compared to previous versions of passenger planes.[/M][SEP]By design, [M]the plane is to be more economical in terms of fuel consumption[/M] compared to previous versions of passenger planes.[SEP][M]By design[/M], [M]the plane is to be more economical[/M] in terms of fuel consumption compared to previous versions of passenger planes.