活动对象模型是可行的备选方法吗？
多年来，这个问题有了好几种备选方法。
There have been several alternative approaches to this problem over the years.
备选方法是把会话数据存储在其他位置中，比方说数据库。
The alternative is to store your session data in a different place, like a database.
采用价值工程方法对备选汽车进行排序分析。
The method of Value Engineering is applied to analyze the mine trucks.
采用价值工程方法对备选汽车进行排序分析。
The method of Value Engineering is applied to analyze the mine trucks.
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