sit-up
noun
ˈsɪtʌp
noun
1
an
exercise
to
make
your
stomach
muscles
strong
in
which
you
sit
up
from
a
lying
position,
while
keeping
your
feet
on
the
floor
仰卧起坐;
Jerry
says
he
does
two
hundred
sit-ups
a
day.
杰里说他每天做两百个仰卧起坐。