The earth rotates once every 24 hours. Because the total length of the equator of the earth is 40076 kilometers, when you sit in the classroom near the equator and listen attentively to the class, you are flying at a speed of 464 meters per second. This speed exceeds the speed of sound in air. At this speed, it is feasible to move 40 thousand kilometers a day. This is what the poem "Sit on the floor and travel 80,000 miles a day" means.
"Sitting on the floor and traveling 80,000 miles a day" is the author's imagination of how time flies, which shows the passage of long years grandly and vividly.
Implication extension
1. This poem embodies the unity of absoluteness and static relativity of material movement.
2. The transition from the ancient geocentric theory to Heliocentrism is a leap in understanding.
The essence of things is often covered by superficial phenomena.
Although technology makes most people admit that the earth is a planet that rotates with the sun, the inherent concept that the sun rises and sets cannot be broken in our daily life.
The diameter of the earth is about 12500 km. If you multiply it by pi 3. 14 16, you will get about 40,000 kilometers, or 80,000 miles. This is the mileage of the earth's rotation (that is, one day).