The biological clock has been fixed.

I think it's great to be woken up by the biological clock on weekends.

When the biological clock wakes up on time, the distant news falls in the eyes.

A word that describes the biological clock accurately, but he never gave in because of the hardships of life.

What does it mean to keep the biological clock on time? Many times I find that although I am their teacher.

Ding-dong woke up on time and met someone in front of him prematurely.