In Modern Chinese Dictionary, when we look up the word "seesaw", in the following usage examples, three Chinese characters "seesaw" are written impressively. And under the word "Qiao", there is really no "seesaw". So there is no such thing as a seesaw.

Seesaw, children's game equipment. Put a shaft in the middle of a long, narrow and thick board, and then put it on a post. Two people sit opposite each other and take turns to push the ground, so that one end lifts and the other end falls, and so on. The game is just for fun.

Seesaw, a kind of children's toy in which more than two people participate. Sit on the seesaw, one person sits at one end, one person goes up and one person comes down. Seesaw is a kind of fitness exercise, which is very interesting and deeply loved by Korean, Russian and other ethnic compatriots.

The principle of the seesaw is the lever principle, the pressure of people on the seesaw is power and resistance, and the distance between people and the fixed point of the seesaw is power arm and resistance arm respectively.

The downward acceleration leads to an upward downward acceleration, and the high downward acceleration is greater than the low acceleration, so the high one falls, while the low one inclines upward under the action of the lever principle, and so on.