The microscopic world; the realm of extremely small particles such as atoms, electrons, and protons that cannot be seen with the naked eye.

a phenomenon that occurs at the microscopic level or within a small-scale system

microeconomics; microeconomy; refers to the economic activities of individual businesses and consumers, such as production, supply, and pricing, as opposed to [[宏观经济|宏觀經濟|hong2 guan1 jing1 ji4]]