methane
noun
ˈmiːθeɪn
noun
1
a
gas
that
you
cannot
see
or
smell,
which
can
be
burned
to
give
heat
甲烷，沼气
Methane
is
one
of
the
principal
gases
contributing
to
the
greenhouse
effect.
甲烷是造成温室效应的主要气体之一。