Another simple example is a ticker behavior, which executes once every set period.
又比如ticker行为，它在每段设定的时期执行一次。
A lasting period of behavior that is different from usual.
长期与平时相异的行为。
Period: period of the periodic behavior in time units.
时期：及时的定期行为的时期单位。
Period: period of the periodic behavior in time units.
时期：及时的定期行为的时期单位。
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