Without the external cue, the difference accumulates and so the internally regulated activities of the biological day drift continuously, like the tides, in relation to the solar day.

如果没有外界提示信号，这种差异就会积累，生物的日常内部调节活动就继续进行，像与太阳日有关的潮汐活动那样。

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Moreover, there is a simple mathematical formula for measuring the cumulative annual drift of the day of the week from the start of the century.

有一个简单的数学公式来计算从世纪初开始的星期年度移位。

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Last year Michael k. Walters of the Air Force Institute of Technology and I came up with a different way of calculating the cumulative drift of the day of the week.

去年空军理工学院的迈克尔和我找到了另一种计算星期年度移位。

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In fact I was a man weighed down with disappointment, a man for whom things had not worked out the way he had once imagined, a quiet man, cautious in his life, timid when you came right down to it, though content enough to drift along through the little rituals of his day.

NEWYORKER: Miracle Polish

For GPS, this is an enormous issue because it turns out that the clocks on the satellites drift by almost 40, 000 nanoseconds per day relative to the clocks on the ground because they are high above the earth's surface (and therefore in a weaker gravitational field) and are moving fast relative to the ground.

BBC: Meet the world's director of time

Stocks continued to drift lower on Thursday adding to the losses since Election Day as the Spyder Trust ( SPY) is down 5% in just seven trading days.

FORBES: 2 Oil Stocks Bucking the Trend