更多ornithopter例句

1. Have a knowledge of the theory of the aeroplane, helicopter, and ornithopter, and of the spherical and dirigible balloon.
2. This experiment remains as the greatest success yet achieved by any machine constructed on the ornithopter principle.
3. The four wings of the semi-ornithopter blurred with motion, lifting the craft into the sky.
4. Red clover bent and writhed in the artificial wind from the ornithopter wings.
5. Ornithopter (or Orthopter)—A flapping wing design of aircraft intended to imitate the flight of a bird.