That concept has always stuck with me , and my partners and I endeavor to do the same periodically .

这一理念一直让我难以忘怀，因此我的合伙人和我也努力定期这么做。

We might do better to periodically consider our limits .

或许，不定期的想一下我们的限界比较好。

Influenza pandemics have struck periodically in historic times .

历史上的流感大流行曾经给我们留下周期性的印象。

Michael gove periodically says how unsatisfactory this all is .

麦克.戈尔周期性地宣称，这多么令人不满意。

Last summer the power was periodically switched off to cover shortfalls .

去年夏天，电力会定期暂停供应以轮换覆盖地区。