n. 核心；芯部；要点；果心（core的复数形式）

n a small group of indispensable persons or things

n the center of an object

n the central part of the Earth

n the choicest or most essential or most vital part of some idea or experience

n a cylindrical sample of soil or rock obtained with a hollow drill

n an organization founded by James Leonard Farmer in 1942 to work for racial equality

n the central meaning or theme of a speech or literary work

n (computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories

n the chamber of a nuclear reactor containing the fissile material where the reaction takes place

n a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil

v remove the core or center from