上述两种转染和感染模型中，发现病毒颗粒呈周期性复制，一般10 - 14天增加一倍。
In both transfection and infection models, virus particles were released in a cyclical manner, with bursts of virus produced every 10-14 days.
按照周期性间隔发送外发的电子邮件，同时复制服务器上的邮件文件来交换两个数据库之间的任何更改。
At a periodic interval, the outgoing email is sent, and the mail file is replicated with the server version to exchange any changes between the two databases.
语言模因具有模仿的选择性、复制的周期性以及传播的变异性等特点。
Linguistic meme has the characteristics of the selectivity of imitation, the periodicity of copy and the variability of spreading.
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