annual clock造句怎麼寫
- 造句
- 關注:3.22W次
In reindeer, even if they're missing a circadian clock, melatonin levels still spike when it's dark and drop when it's light, making the equinoxes an ideal time to synchronize their annual clocks.
So they probably rely on an annual clock instead, set by the hormone melatonin.
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