软件主体通过光盘发售，使虚拟软件狗可以通过电子邮件传送。
Software body sales through CD, virtual software dog can be transmitted by E-mail.
在线市场中，信息搜寻成本大大下降了，并且出现了可以自动搜寻各种信息包括价格信息的自动软件主体。
In online market, the information search cost has been greatly reduced, and now bots appear which can automatically search various information including price information.
通常情况下，在主体软件完成之后，跟踪和日志都需要额外添加代码。
Very often adding tracking or logging requires additional code to be written after the main software is complete.
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