周期函数

periodic function

surname Zhou / Zhou Dynasty (1046-256 BC)

to make a circuit / to circle / circle / circumference / lap / cycle / complete / all / all over / thorough / to help financially

week / weekly / variant of 周[zhou1]

period / cycle

variant of 期[qi1] / period / cycle

a period of time / phase / stage / classifier for issues of a periodical, courses of study / time / term / period / to hope / Taiwan pr. [qi2]

envelope / case / letter

variant of 函[han2]

function (math.)

to count / to count as / to regard as / to enumerate (sb's shortcomings)

number / figure / several / CL:個|个[ge4]

frequently / repeatedly