The hummingbird perches on a twig of the hawthorn.小蜂鸟栖在山楂树枝上.The wings of a bee and those of a hummingbird are analogous.蜜蜂的翅膀和蜂雀的类似.The hummingbird is the only bird that can fly backward.蜂鸟是唯一能倒退向后飞的鸟....
The hummingbird is the only bird that can fly backward.蜂鸟是唯一能倒退向后飞的鸟.The wings of a bee and those of a hummingbird are analogous.蜜蜂的翅膀和蜂雀的类似.The hummingbird perches on a twig of the hawthorn.小蜂鸟栖在山楂树枝上.A hummingbird is p...