aperiodic
[ˌeɪpɪrɪ'ɒdɪk]
adj.
非周期性的;
不定期的;
非周期的;
（振动等）非周期的;
例句:
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Such aperiodic motions are not quantized.
这种非周期性的运动不是量子化的.
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Inertia element ( aperiodic element )
惯性环节 ( 非周期环节 )
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Events that are aperiodic and represent an occurence.
不定期的并表示出现一次的事件.
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He is obsessed with aperiodic tile patterns.
来自NEWYORKER
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It is one component of solar variation, the other being aperiodic fluctuations.
来自BBC
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The data is aperiodic, or episodic, probably chaotic but again we do not know.
来自SA