The basic meaning of "flat" is not inclined or uneven, just like a still water surface, such as flat ground and plane, which means equality, such as equal, parallel and uneven holding. In daily use, "Ping" is often used as an adjective to express a calm and steady tone. The basic meaning of "migration" is change, such as migration and empathy, which is an old official document. In daily use, "migration" is often used as a verb to express migration, such as transplantation and migration.
Rotation, Chinese vocabulary, the pinyin of the third edition of Xinhua Dictionary is xuán zhuàn (the pinyin of the seventh edition of Modern Chinese Dictionary is Xu á n Zhu N), which means that an object moves in a circle around a point or an axis. For example, the earth rotates around the earth's axis and also around the sun. From Huai Nan Zi Yuan Tao Xun: "The so-called weak will, strong things, carefree, not lost, rotate with everything."
Relationship and difference between translation and rotation
1, contact information
Both rotation and translation are phenomena of object movement, and they all move in a certain direction, and their shapes, sizes and properties do not change during the movement.
2. Difference
This movement phenomenon of translation, also known as parallel movement, is that an object or figure moves in a straight line in the same plane and moves a certain distance in a certain direction. Its characteristic is that the connecting line of any two points on the object always keeps parallel motion in the process of motion, and the motion distance is equal; The movement phenomenon of rotation is that a figure or an object moves in a circle around a certain point or axis. The characteristic of its motion mode is that all points on the object make circular motion around the central point, and the characteristic is that all points on the object make circular motion around the central point.