Die 100 am häufigsten verwendeten Wörter in diesem Buch.
activity
alcohol
alert
alertness
apnea
asleep
avoid
awake
bed
bedroom
bedtime
better
biological
body
brain
cause
change
chapter
clock
day
daytime
debt
disorders
down
dr
dreams
drive
driving
during
early
effects
even
experience
eyes
fall
feel
few
first
five
four
get
go
good
help
hours
insomnia
jet
keep
know
lag
least
less
life
light
likely
long
mattress
may
memory
might
minutes
morning
movements
nap
need
new
night
occur
often
people
percent
performance
period
pillow
pills
power
problems
rem
schedule
see
shift
should
sleep
sleepiness
sleeping
sleepy
stage
stay
take
three
time
try
two
wake
week
without
work
workers
years
yes