adj. aperiodic ; nonperiodic ; acylic ; deadbeat
非循环的/非周期的 acyclic
非周期摆动的可动部分 aperiodic element
确定性的非周期流 Deterministic Nonperiodic Flow
非周期分量的时间常数 time constant of the aperiodic component
寻找周期：周期的和非周期的。
讨论了复杂性概念的科学及哲学定位，给出复杂性概念的一个界定：“存在多个有意义、不确定、非周期的可区分状态”。
The scientific and philosophy location of complexity concept was discussed, and a definition was given that" there are many distinguishable states that are meaningful, uncertain and nonperiodic".
长期趋势显示，美国非寿险公司的收益率（理赔金和运营成本之和与保费的百分比率）和经济周期没有明显的相关性。
The long-term trend in profitability (claims and operating costs as a percentage of premiums) for America’s non-life insurers shows no obvious correlation with the economic cycle.
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