Microscopic objects in nature generally refer to particles with a spatial dimension of fewer than 10-6 centimeters and a mass of fewer than 10-15 grams, including material levels such as molecules, atoms, nuclei, elementary particles. Microscopic particles and various phenomena in an extremely small space, Generally called micro phenomena. Microparticles and micro phenomena are collectively referred to as the micro world. The movement of the micro-world obeys the laws reflected by quantum mechanics and quantum electrodynamics. The most accurate recap of this passage is:. ['What are micro-objects.', 'What are the components of micro-objects.', 'What is a micro phenomenon.', 'What is the micro world.']