VOA慢速英语:Bladeless Wind Generator Safe for Birds

blade – n. a flat long turning part that is used on some machines to push air or water

generator – n. a machine that produces electricity

vibration – n. a continuous slight shaking movement : a series of small, fast movements back and forth or from side to side

maintenance – n. the act of keeping property or equipment in good condition by making repairs, correcting problems, etc.

mast – n. a tall pole that supports or holds something

oscillate – v. to move in one direction and then back again many times

prototype – n. an original or first model of something from which other forms are copied or developed