Women aren't the only ones who have biological clocks.

不是只有女人才有生理时钟。

youdao

Some people have biological clocks, I might have a biological BlackBerry.

有些人有生物钟，我多半是有生物黑莓。

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McGrath puts it this way: "For a long time women have been warned about their ticking biological clocks."

McGrath是这样说的：“很长时间以来，人们一直告诫女性要孩子时要考虑滴答不停的生物时钟。”

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Scientists talk about many kinds of subjects -- from black holes to biological clocks to botany.

VOA: special.2010.05.14

The topics discussed at these science cafs are as varied as scientific research itself: from black holes to biological clocks to botany.

VOA: standard.2010.05.04

Hall, Michael Rosbash and Michael W. Young "for their discovery of molecular mechanisms underlying circadian rhythms, " the committee said, which are guided by biological clocks and drive the waking and sleeping cycle.

WSJ: Six U.S.-Born Scientists Win Asian Prize

This is the period of time that the cicada nymphs remain underground, feeding on sap from tree roots until their biological alarm-clocks go off.

ECONOMIST: The 17-year cicadas are about to emerge in force