They need a good night's rest. They need to have no distractions.
They need their beauty sleep
Because they need there beauty sleep.
6 to 8 hours
You need to think about exactly what you mean by 'recycled beauty' before trying to translate it.
It means you need to get more booty.
It means you need to get some sleep
It means you need time to think about it before you make a decision - traditionally, you need a day and night, thus saying you're going to sleep.
it means that you need sleep
It means that you're overly tired and you need to get some sleep.
All humans typically need eight hours of sleep, no matter the age? Your age doesn't mean anything to your sleep. Age and your hours of sleep are useless to each other.
You will learn how to do someone's hair. That will help you work in a beauty salon and learn the skills you need.
To need some sleep - to spend some time with eyes shut