By isolating organisms completely from external periodic cues, biologists learned that organisms have internal clocks.

通过将生物体与外部的周期信号完全隔离，生物学家了解到生物体有内部的生物钟。

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Their internal clocks start counting from then, so they can calculate the date and time in the future.

他们的内部时钟从那时开始运转，使得他们能够在之后计算日期和时间。

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Kids who are struggling to get out of bed in the morning may need help resetting their internal clocks, he says.

他说，那些每天早上都赖床不起的孩子需要有人帮助他们重新设置他们的生物钟。

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But of course Smith cannot direct your internal clocks and definitions of success in life.

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However, some other internal clocks readjusted at different rates and weren't all working correctly until the eighth day.

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Like people, hamsters follow precise circadian rhythms, so changes in time will similarly throw off their internal clocks.

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