A duck steps forward: it describes that people walk lightly and flexibly without dragging their feet. Yalu river flow: it means that things are constantly developing and changing, and there is no end. Duck-egg-stone: Metaphor seems ordinary on the surface, but it contains infinite possibilities inside.
"Duck Step Goose Walk" comes from the second discount of "Dongtanglao" in Fu Jian, Qin Yuan: "I can't help but admire your duck step Goose Walk." The original meaning of this idiom is that ducks and geese take eight steps, which is used to describe people walking slowly and staggeringly, walking slowly and stumbling. With a derogatory connotation.
The following is the extended knowledge about ducks:
The duck's body has evolved to be heavy before and light after, adapting to underwater life. Ducks have eyes on both sides of their heads and can only see the left and right sides, so they like to look at people with their heads tilted. The duck's feathers don't get wet because its tail is covered with waterproof oil, so the duck will peck its ass and then apply it to its body.
Ducks like to stand quietly in the rain on rainy days, which is their unique way to hide from the rain. Because duck feathers are waterproof, if you don't move, the rain will paddle away along the feathers, but running around will wet the feathers. Ducks' calls will change with age. Ducklings have a small chest and abdomen, and their calls will be particularly sharp. It will become thick and long when you grow up.
When a duck swims, its legs are very short, very backward, and there are webbed toes, which paddle in the water like paddles, so that the duck can paddle forward in the water.
Duck feathers have many functions, waterproof: Duck feathers are waterproof, which enables them to swim in the water without getting wet. Keep warm: Duck feathers can provide warmth and help them keep warm in cold water. Duck feathers are the key to their flight. There are many feathers on their wings, which can provide lift and stability.
Duck feathers can provide some protection and help them avoid injury. Camouflage: Ducks' feathers can help them camouflage in the water, making them more difficult to be found by natural enemies. In short, duck feathers are an important tool for their survival and reproduction.