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on the alert
on the alert
英 [ɔn ðə əˈlə:t] 美 [ɑn ði əˈlɚt]
on the alert基本解释
注意； 提防； 警戒； 警惕着； 处于戒备状态
on the air
on the grounds of
大学英语四级单词大全
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over and over
out of practice
out of touch
out of the question
out of sight
out of place
out of breath
out of order
once in a while
out of doors
out of date
out of control
once for all
once again
on time
on the whole
on the spot
on the road
on the point of
on the other hand
on the ground of
on the contrary
on second thoughts
on schedule
on sale
on purpose
on occasion
on hand
on foot
on fire
on guard
on earth
on duty
on condition that
on one hand
on business
on board
on behalf of
on account of
on a small scale
on average
on a large scale
off and on
optimistic
on the basis of
on the whole
once in a while
on purpose
on duty
off duty
on the contrary
on the spot
on business
own
oversea
over
outside
out
ourselves
ours
our
on condition that
out of
other
origin
of itself
on the ground of
orange
only
open
onion
once
on
omit
old
often
oil
on board
official
office
offend
of
odd
October
ocean
occur
occupy
one after another
occasion
or so
observe
oblige
object
once
omit
old
oil
on
ox
owner
own
owl
owing
owe
overwhelm
overvalued
overthrow
overtake
overproduction
overpass
overlook
overlap
overhear
overflow
overdraw
overcome
overcoat
over
oven
outward(s)
outstanding
outside
output
out-of-stock
outlook
outline
outlet
outing
outer
outdoor
outcome
out
ourselves
ours
our
ounce
ought
otherwise
other
orthodox
ornament
original
origin
orient
organization
organize
organ
ordinary
orderly
order
别人正在查
annual
yenel
bacon
married name
advisableness
corps
desultory reading
gigantic leap
cliquish
evade
counter life
boomerang needle holder
