[
t
]the
two
friends
were
walking
in
the
desert.
[
f
]they
were
going
to
cool
and
swim
in
the
lake.
[
t
]the
other
friend
wrote
sentences
on
the
stone.
[
t
]the
wind
can
blow
the
words
in
the
sand.
[
t
]in
fact,
they
were
real
friends.
这个故事很老，但是意义很深刻。
希望你能帮到你。
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