body clock
noun/ˈbɒdi klɒk/
/ˈbɑːdi klɑːk/
- a natural system that makes your body need sleep, food, etc. at particular times of the day
（人体）生物钟 - I only arrived in London yesterday, and my body clock is still on New York time.
我昨天刚到伦敦，而我的生物钟仍然是纽约时间。
- I only arrived in London yesterday, and my body clock is still on New York time.