第1个回答 2019-10-10
Sleep
It＇s
clear
that
everyone
needs
to
sleep.
Most
people
rarely
think
about
how
and
why
they
sleep,
however.
We
know
that
if
we
sleep
well,
we
feel
rested.
If
we
don＇t
sleep
enough,
we
often
feel
tired
and
irritable.
It
seems
there
are
two
purposes
of
sleep:
physical
rest
and
emotional
and
psychological
rest.
We
need
to
rest
our
bodies
and
minds.
Both
are
important
in
order
for
us
to
be
healthy.
Each
night
we
alternate
between
two
kinds
of
sleep:
active
sleep
and
passive
sleep.
The
passive
sleep
gives
our
body
the
rest
that＇s
needed
and
prepares
us
for
active
sleep,
in
which
dreaming
occurs.
Throughout
the
night,
people
alternate
between
passive
and
active
sleep.
The
brain
rests,
then
it
becomes
active,
then
dreaming
occurs.
The
cycle
is
repeated:
the
brain
rests,
then
it
becomes
active,
then
dreaming
occurs.
This
cycle
is
repeated
several
times
throughout
the
night.
During
eight
hours
of
sleep,
people
dream
for
a
total
of
one
and
half
hours
on
the
average.
此文说明了人们为什么要睡眠，以及睡眠状态中做梦的情况。从第三段中可以看出，睡眠中做梦是正常情况，而非有些人所认为的：做梦会影响休息。文中所用句式、词汇都非常简单，甚至多有重复，但表达极为清楚，连贯。
[参考译文]
睡眠
很明白，人人都需要睡眠。然而，大多数人很少思考他们是如何或为何睡眠的。我们知道只要睡好了，就觉得休息好了。如果睡眠不足，就会觉得乏困，易怒。
睡眠好像有两个目的：身体休息和情绪或心理休息。我们需要让躯体和大脑都得到休息。为了保持健康，二者都很重要。每天夜里，我们交替在两种睡眠之间：积极睡眠和消极睡眠。消极睡眠使我们的身体得到所需的休息，同时为积极睡眠做准备。在积极睡眠中，梦就出现了。
整个晚上，人们在消极睡眠和积极睡眠间变换。大脑得以休息，随后活跃起来，接着梦便开始。如此循环：大脑休息好了，活跃起来，梦又开始了。这样的循环整个晚上要反复好几次。八小时的睡眠中，人们平均要做上整整一个半小时的梦。