n.
an interval during which a recurring sequence of events occurs
"the never-ending cycle of the seasons"
同义词:rhythmround
a series of poems or songs on the same theme
"Schubert's song cycles"
a periodically repeated sequence of events
"a cycle of reprisal and retaliation"
the unit of frequency; one hertz has a periodic interval of one second
同义词:hertzHzcycle per secondcycles/secondcps
a single complete execution of a periodically repeated phenomenon
"a year constitutes a cycle of the seasons"
同义词:oscillation
a wheeled vehicle that has two wheels and is moved by foot pedals
同义词:bicyclebikewheel