n. 功能；函数（function的复数形式）

n (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)

n what something is used for

n the actions and activities assigned to or required or expected of a person or group

n a relation such that one thing is dependent on another

n a formal or official social gathering or ceremony

n a vaguely specified social event

n a set sequence of steps, part of larger computer program

v perform as expected when applied

v serve a purpose, role, or function

v perform duties attached to a particular office or place or function