why
the
traffic
signs
should
be
set
there
in
the
city
and
town?
as
the
number
of
the
vehicles
is
getting
larger
and
larger
the
damage
of
the
car
is
has
become
a
serious
problem
around
the
world,
there
are
hundreds
of
thrands
of
people
were
killed
by
the
cars
and
vehicles.
to
reduce
the
damage
of
the
auto
people
in
the
city
and
town
decide
to
set
up
traffic
signs
in
the
city
and
town.
为什么要设立交通标志
随着车子的数量越来越多
由车辆引起的伤害成为了一个世界性问题
为了降低车辆对人的伤害
人们在城镇里开始设立交通信号标志