A third cue your body USES to set its internal clock is temperature.

你的身体发送给生物钟的第三个信号是温度。

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A fourth cue your body USES to set its internal clock is food.

身体调节生物钟的第四个信号是食物。

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A fourth cue your body USES to set its internal clock is food.

身体调节生物钟的第四个信号是食物。

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