trampoline
noun
ˈtræmpəliːn
noun
1
a
piece
of
equipment
that
you
jump
up
and
down
on
as
a
sport.
It
consists
of
a
metal
frame
with
a
piece
of
strong
cloth
stretched
tightly
over
it.
蹦床，弹床〔一种体育器械〕