The paper researches the spectrum characteristics of dynamic response of the gear pair with the error excitation in the long and short period based on dynamic mating model of the gear pair.

基于齿轮副的动态啮合模型，对具有误差激励的齿轮副按长、短周期从理论上研究了其动态响应特征。

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However, the mating period lasts less than two days and they are kept separate for rest of the year.

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Males and females even doing it during the mating period, and they end up with these little facial injuries and that seems to be the way that the tumor cells are transferred from crumbly friable tumors on the face of one devil into the facial wounds on another devil.

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Now, she added, the post-proposal time period is considered its own step in the mating process.

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