The biggest benefit you will gain from using a commercialpackage is a pre-built strategy for handling backups that you can just put to work.
使用商业软件包的最大好处是，有一个预先建立的用于处理备份的策略，您可以立即投入工作。
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Based on the commercialpackage Macsyma, Maxima includes a complete ALGOL-like programming language and is most useful for teaching programming concepts in computer algebra.
Moon Express's mission involves plans to land a suitcase-sized package of scientific equipment on the moon for ongoing exploration and commercial development.