Researchers have found that light intensity can adjust the clock forward or backward by regulating the hormone melatonin.

研究人员发现，通过增强光亮调节褪黑激素可以将生物钟向前或向后调整。

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The majority must adjust their body clock for it.

大多数人必须为此调整自己的生物钟。

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Whenever we change sleep cycles your biological clock has to adjust to the new schedule.

每当我们改变睡眠周期时，你的生物钟就得作出相应的调整。

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Travellers on long-haul flights, for example to California, which is eight hours behind UK time, take about a week to recover as the body clock can only adjust by one hour a day, he said.

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The reasoning behind this advice is that the average person can only adjust their internal clock by an incremental amount of 60 to 90 minutes a day.

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Chief amongst them is the Wireless Command Center, an oblong remote control useable from anywhere in the home that lets users steer the Roomba, send it back to its base, schedule a cleaning and adjust its clock.

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