Rock 'n' roll had entered a period of stasis.

摇滚乐已经进入了一个停滞期。

《柯林斯英汉双解大词典》

The key here is to plan out the feature set and then a devise a roll out project plan that allow small amounts of functionality over a period of time.

这里的关键是为功能设置做规划，然后设计一个在一段时间内允许少量功能的项目推广计划。

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The earlier period failure of the spline shaft for a 4-roll rolling mill occurred after an operating period of 4 months.

四辊轧机的花键轴服役四个月便发生了早期失效。

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Following a period of testing and development, the NPSA plans to roll-out the system across the NHS in England and Wales from 2003.

BBC: Patients 'at risk' from drug errors

At the end of each grading period, my mom would ask me if I had made the honor roll.

FORBES: Who Sets Your Benchmarks?