# Earths rotation speeds up suddenly

It is easy for young people to learn but difficult to achieve, and an inch of time is not to be taken lightly. Unaware of the dream of spring grass in the pond, and the sound of autumn leaves in front of the steps. "Encouraging Learning" What is time? In

It is easy to be young and hard to learn, and an inch of time is not to be taken lightly. Unaware of the dream of spring grass in the pond, and the sound of autumn leaves in front of the steps. "Encouraging Learning" What is time? In fact, most people do