alert
adj
verb
noun
əˈlɜːt
adj
1
giving
all
your
attention
to
what
is
happening,
being
said
etc
警惕的，警觉的
The
animal
raised
its
head,
suddenly
alert.
那只动物抬起头，突然警觉起来。
Taking
notes
is
one
of
the
best
ways
to
stay
alert
in
lectures.
记笔记是听课集中注意力的最佳方法之一。
2
able
to
think
quickly
and
clearly
机警的，机敏的
Jack
was
as
mentally
alert
as
a
man
half
his
age.
杰克的头脑和年龄小他一半的人一样灵活。
3
be alert to sth
to
know
about
or
understand
something,
especially
a
possible
danger
or
problem
警觉某事
The
authorities
should
have
been
alert
to
the
possibility
of
invasion.
当局早就应该认识到入侵的可能性了。
verb
4
to
officially
warn
someone
about
a
problem
or
danger
so
that
they
are
ready
to
deal
with
it
使警觉; 向…发出警报
The
school
immediately
alerted
the
police
.
学校立即报了警。
5
to
make
someone
realize
something
important
or
dangerous
提醒，引起〔某人〕重视
alert
sb
to
sth
campaigns
to
alert
the
public
to
the
dangers
of
HIV
使公众认识到艾滋病病毒危险的宣传活动
noun
6
a
warning
to
be
ready
for
possible
danger
警报
C
a
bomb/fire/terrorist
etc
alert
a
full-scale
flood
alert
最高级别的防洪警报
The
bomb
alert
was
raised
soon
after
midnight.
刚过子夜，防空警报就拉响了。
7
on (the) alert (for sth/sb)
ready
to
notice
and
deal
with
a
situation
or
problem
（对某事物/某人）保持警惕
Be
on
the
alert
for
anyone
acting
suspiciously.
警惕举止可疑的人。
Troops
in
the
vicinity
were
put
on
alert
.
附近地区的军队受命进入戒备状态。
on
full
alert
also
又作
on
high
alert
(completely
ready
to
deal
with
a
dangerous
situation)
全面戒备
All
our
border
points
are
on
full
alert.
我们所有的边防站都处于全面戒备状态。