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。

youdao

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。

youdao

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

The next time you think about going without sleep, consider this: Laboratory animals that are kept awake for long periods of time ...die.

VOA: special.2009.08.26

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

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

FORBES: Forget Sustainability Programs

"He'd take it out and look at it for long periods of time, " she said.

WSJ: Rare 1913 Nickel Auctioned for $3.1 Million

Few people want to readily commit themselves to a courtroom for long periods of time.

WSJ: Psst! You Want to Duck Jury Duty?