ترجمه عبارت Several internal and external factors influence...

ترجمه عبارت زیر:

Several internal and external factors influence our alertness as well as our mental and physiological 
performances. For circadian rhythms to benefit an organism, they must be synchronized to the daily 
changes in the environment. Light–dark rhythm is a strong natural zeitgeber that synchronizes our 
biological rhythms in accord with the 24-hour day length of the earth.