than
that
used
that
or
defined
and
were
which
less
is
between
also
and
are
various
early
along
to
were
is
powered
were
designed
is
used
consist
similar
provided
is
powered
mean
and
which
been
Although
by
number
for
of
more
However
researched
has
not
additional
onwards
order
pulled
most
such
In
as
include
called
more
which
known
from
is
to
A
train
is
a
form
of
rail
transport
____________________
consists
of
a
series
of
vehicles
____________________
usually
run
____________________
a
rail
track
to
transport
cargo
or
passengers
.
Motive
power
____________________
____________________
by
a
separate
locomotive
____________________
individual
motors
in
self
-
propelled
multiple
units
.
____________________
historically
steam
propulsion
dominated
,
the
____________________
common
modern
forms
are
diesel
____________________
electric
locomotives
,
the
latter
supplied
____________________
overhead
wires
or
____________________
rails
.
Other
energy
sources
for
trains
____________________
horses
,
rope
or
wire
,
gravity
,
pneumatics
,
batteries
,
____________________
gas
turbines
.
Train
tracks
usually
____________________
of
two
,
three
or
four
or
five
rails
,
with
a
limited
____________________
of
monorails
and
maglev
guideways
in
the
mix
.
The
word
'train'
comes
____________________
the
Old
French
"
trahiner
"
,
and
from
the
Latin
"
trahere
"
,
____________________
means
?
pull
,
draw
"
.
There
are
____________________
types
of
trains
that
____________________
____________________
for
particular
purposes
.
A
train
may
consist
____________________
a
combination
of
one
or
____________________
locomotives
and
attached
railroad
cars
.
They
may
also
have
a
self
-
propelled
multiple
unit
which
____________________
____________________
a
railcar
.
The
first
trains
____________________
____________________
by
a
rope
.
Later
,
they
____________________
____________________
by
gravity
,
or
pulled
by
horses
.
In
the
____________________
19th
century
,
almost
all
trains
____________________
____________________
by
steam
locomotives
.
From
the
1910s
____________________
,
the
steam
locomotives
began
to
be
replaced
by
____________________
labor
-
intensive
and
cleaner
diesel
locomotives
____________________
electric
locomotives
which
were
____________________
complex
and
expensive
.
____________________
,
those
steam
trains
were
more
complex
and
expensive
____________________
the
earlier
trains
.
A
passenger
train
is
a
type
of
train
____________________
includes
long
vehichles
that
carry
passengers
.
One
popular
long
-
distance
train
category
is
high
-
speed
rail
.
____________________
____________________
____________________
achieve
much
faster
operation
over
500
km
/
h
(
310
mph
)
,
innovative
Maglev
technology
____________________
____________________
____________________
for
years
.
In
most
countries
,
____________________
____________________
the
United
Kingdom
,
the
distinction
____________________
a
tramway
and
a
railway
is
precise
and
____________________
in
law
.
The
term
light
rail
____________________
sometimes
____________________
____________________
a
modern
tram
system
,
but
it
may
also
____________________
an
intermediate
form
between
a
tram
and
a
train
,
____________________
____________________
a
subway
except
that
it
may
have
level
crossings
.
A
freight
train
which
____________________
____________________
____________________
as
goods
train
uses
freight
cars
.
Wagons
or
trucks
are
used
to
transport
goods
or
materials
(
cargo
)
in
these
trains
.
A
freight
train
____________________
is
speacially
designed
for
cargo
transportation
____________________
____________________
____________________
by
passengers
.