These work groups form an informal (and still incomplete) lifecycle for the execution of portfolio management in an organization.

这些工作组形成了一个非正式的(且仍不完整)的组织中项目组合管理的执行生命周期。

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Teaching in both countries is usually quite informal. Students often work together in groups, and go to the teacher only when they need help.

英美两国的教学大都很随意。学生通常组成小组学习，只在需要帮助时才会去找老师。

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