Fill in the Blanks (Reading & Writing)

Modern wind turbine blades are engineered to —extractforbidpostponepublish maximum energy from air currents while minimising structural stress. Their curved, tapering shape is modelled on aerofoils used in aviation, allowing the blades to —generateforfeitconcealinterrupt lift even in relatively gentle breezes. Engineers must also account for fatigue, since a blade may complete over a hundred million —rotationsapologiessignaturesdeposits during its operational lifetime.