基本信息
At the beginning of this century, medical scientists made an interesting discovery; we are built not just of flesh blood but also of time. They were 1 to show that we all have “a body clock” 2 us, which controls the 3 fall of our body energies, 4 us different one day one to the next.
The 5 of “a body clock” should not be too 6 since the lives of most living things are controlled 7 the 24 hour night--day cycle. We feel 8 fall
