unprecedented
adj
ʌnˈpresɪədentɪəd
adj
1
never
having
happened
before,
or
never
having
happened
so
much
空前的，前所未有的
He
took
the
unprecedented
step
of
stating
that
the
rumours
were
false.
他史无前例地声明谣言是子虚乌有的。
Crime
has
increased
on
an
unprecedented
scale
.
犯罪活动的增加规模空前。
[+
in
]
an
event
that
is
unprecedented
in
recent
history
近代历史上没有先例的事件