Being lonely for long periods of time is not a great feeling.

长时间的孤独并不是一种好感觉。

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Sitting in one position for long periods of time is nor healthy.

长时间保持一种姿势并不健康。

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It'll have to operate for long periods of time in very cold temperatures.

它必须长时间在非常低的温度下运行。

youdao

Drinking large amounts of alcohol over long periods of time has also been linked to a number of cancers.

VOA: special.2009.09.08

Cells can stop in their lifetime at some point in the cell cycle and persist for long periods of time.

细胞生命期可以停止在细胞周期的某个点,并保持很长时间

耶鲁公开课 - 生物医学工程探索课程节选

A lot of these processed foods have very long shelf lives and therefore can be stored for long periods of time.

很多加工食品为了便于储藏销售,都有很长的保质期

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Therefore, the optimum asset allocation to gold over long periods of time is zero.

FORBES: The Optimum Asset Allocation to Gold Is Always Zero

They have stored worth and tend to be uncorrelated with stocks over long periods of time.

FORBES: Silver's Bubble And Volatility

Organizations can potentially perform well financially, socially, and environmentally for long periods of time.

FORBES: Forget Sustainability Programs