Almost all of scholars only studied the possible appearance or disappearance of a limit cycle surrounding a singular Point.

几乎所有的学者只针对极限环内含奇点的情况，讨论了极限环的存在性、唯一性、稳定性以及如何产生与消失。

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The time of the appearance and disappearance of the strike point at the target is in agreement with the signals measured by the static electric probes.

计算获得的偏滤器内外靶板上打击点出现和消失的时间与布置在偏滤器靶板上静电探针测量到的信号很好地符合。

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However, experts point out that the disappearance of HIV patients is not known yet, whether by bone marrow transplantation in the treatment of AIDS is still uncertain.

但专家指出这名患者艾滋病病毒消失的原因尚未确定，究竟能否用骨髓移植治疗艾滋病还是未知数。

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For Fairs, wearable technologies such as Google Glass point to another major evolution in design: the disappearance of objects altogether.

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