rider
noun
ˈraɪdə
noun
1
someone
who
rides
a
horse,
bicycle
etc
骑师; 骑车者;
a
horse
and
rider
马匹和骑师
2
an
extra
or
more
detailed
piece
of
information
that
is
added
to
an
official
document
and
changes
it
slightly
〔公文的〕附文，附件，附加条款