sly
adj
slaɪ
adj
1
someone
who
is
sly
cleverly
deceives
people
in
order
to
get
what
they
want
狡猾的，狡诈的;
2
sly smile/glance/wink etc
a
smile,
look
etc
that
shows
you
know
something
secret
诡秘的微笑/一瞥/眨眼等
He
leaned
forward
with
a
sly
smile.
他俯身向前诡秘地一笑。
3
on the sly
secretly,
especially
when
you
are
doing
something
that
you
should
not
do
[非正式] 秘密地，偷偷地，暗地里
informal
They’d
been
seeing
each
other
on
the
sly
for
months.
他们已经偷偷约会了好几个月。