身體自己在走的鐘
這是畫面本身：鐘就在身體裡，安靜地走，決定作息。
noun · B2
The system inside a plant or an animal that keeps track of time and decides when it sleeps, wakes, eats, grows or has young, and that keeps running even when nothing outside is telling it the time.
生理時鐘
核心畫面
One way to hold this phrase is to picture a clock with no face and no hands, sitting inside a living body and quietly running. Nobody winds it and nobody reads it, but it decides when the body gets sleepy, hungry, awake, or ready to grow. You only notice it when it disagrees with the clock on the wall - and if you can actually hear it , it is because something is counting down.
可以想成身體裡有一個鐘，沒有錶面，也沒有指針，安安靜靜自己在走。沒有人上發條，也沒有人看它，但它決定什麼時候想睡、什…更多收起
可以想成身體裡有一個鐘，沒有錶面，也沒有指針，安安靜靜自己在走。沒有人上發條，也沒有人看它，但它決定什麼時候想睡、什麼時候肚子餓、什麼時候醒得過來。只有當它跟牆上的鐘意見不合時，你才會發現它。而如果你真的聽得見它在滴答響，那通常表示有什麼正在倒數。Two branches
聽得見滴答的那個鐘
同一個鐘，但這次被聽見了；聽得見，就表示在倒數，而不只是在報時。
noun · B2
The idea that there are only so many years in which a person, usually spoken of as a woman, is able to have a baby, so that as the years pass she may feel time running out and feel pushed to decide soon.
生育年齡的時間壓力