Baby cuckoos oust other baby birds from their nests.布谷鸟的雏鸟把其他鸟的雏鸟逐出巢外.Four cuckoos inside the zoo.动物园里四只杜鹃.Let there be cuckoos, a lark and a dove.让这里有布谷鸟, 云雀,和鸽子....
轻型飞机飞行时起落架不一定缩回.The undercarriage on light aircraft does not always retract in flight.男孩看见那条蛇吓得猛地缩回.The boy started back in fear when he saw the snake.但是现在要缩回来当然为时已晚.But it was too late then, of course, to back out....