In the early 1900s scientists found that animals have circadian rhythms, too: they also are capable of maintaining a 24-hour-long activity pattern in the absence of external cues such as light.

在20世纪初，科学家们发现，动物也有昼夜节律：即使没有如光线之类的外部变化的提示，动物也能保持一个24小时的活动周期。

youdao

Not many,' answered Linton; `but he goes on to the moors frequently, since the shooting season commenced; and you might spend an hour or two with me in his absence.

“没有好多天，”林惇回答，“可是自从猎季开始，他常常到旷野去；当他不在的时候你可以陪我一两个钟头，答应我你一定要来。

youdao

There were many such pauses in the hour prior to this one, as Neeson told the story of Richardson's death, related her absence in the life of his family.

之前的采访中也经常出现这样的停顿，当尼森讲到他妻子理查德森的死，关于她离开后他的家庭生活。

youdao

The presence of these applications is truly never felt, but a one-hour of absence surely is.

FORBES: When the past should be seamlessly woven into the future

The absence of practice sessions makes the hour-and-a-half race-morning course inspection all the more crucial.

BBC: Sport - Winter Sports - Alpine skiing: Super-G

United waited until the hour before introducing Rooney and his return from a five-week absence was met with cheers and jeers from the Old Trafford faithful, with his bitter contract negotiations that resulted in him belatedly signing a new five-year deal still fresh in the memory.

BBC: Man Utd 2-0 Wigan