- secular
- 非: mistake; wrong; errors
- 周期性: periodicity; cyclicity
- 非周期性: aperiodicity; non-periodicity; secular
- 非周期性摆: aperiodic pendulum
- 非周期性的: acyclic; aperiodic aerial; no eriodic; non periodical; noncyclic; non-periodic
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长期性；非周期性的英文
发音:
- secular
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