我第三个关键点是项目组合管理实践集可能按阶段引入。
My third key point is that the set of portfolio management practices may be introduced in stages.
poll 缓存管理一个可能很大的文件描述符集。
The pollcache manages a potentially large set of file descriptors.
项目组合管理实践集可能按阶段引入。
Introduce the set of portfolio management practices in stages.
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