There are some birds that cannot fly. Penguins use their wings as flippers. They can swim well, but they cannot fly. Birds, such as the New Zealand kiwi, cannot fly.

• 有些鸟是不会飞行的。企鹅把翅膀当作鳍来使用。它们很擅长游泳,但却不会飞行。有的鸟,如新西兰几维鸟,也不会飞行。