Also, sleep scientists know that even a small variation in people's circadian cycles gets amplified by such factors as when in their cycle light strikes the eye.

睡眠专家也指出人昼夜周期中，即使是很小的变动，也会随着周期的不断推移而扩大。

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After they were weaned, they were kept in the same light cycle for several weeks or switched to the opposite one.

在这些老鼠断奶后，他们被放置在相同的光照周期中长达数周，或转换到相反的光照环境。

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The light may interfere with their normal growth cycle.

VOA: special.2010.06.29

"The good news is that people who stay up late in front of the television and computer may be able to undo some of the harmful effects just by going back to a regular light-dark cycle and minimizing their exposure to artificial light at night, " Bedrosian says.

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The aircraft carriers that were in the training cycle or undergoing light maintenance were quickly made available for these operations.

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The new film has been updated with all of the modern bells and whistles including light cycle races in 3-D and Jeff Bridges acting opposite a digital version of his younger self.

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