He has an internal clock that the Swiss would envy.

他有一个让瑞士人都妒忌的生物钟。

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。

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。

Sunshine may help to reset the internal clock that regulates sleep.

阳光能重新调整人体内部的控制睡眠的时钟。

Similar to your bedside alarm clock, your internal clock runs on a 24-hour cycle.

跟你的床头钟类似，你的内部时钟也是以24小时为周期的。