詞語：at once
at once是什麼意思
簡明英漢詞典
at once
adv.
立刻
美國傳統詞典[雙解]
once
once
AHD:[w?ns]
D.J.[w(ns]
K.K.[w(ns]
adv.（副詞）
(1)One time only:
僅僅一次：
once a day.
一天一次
(2)At one time in the past; formerly.
過去的某一時間；以前
(3)At any time; ever:
從前；曾經：
Once known, his face is never forgotten.
曾經認識，他的面容讓人永生難忘
(4)By one degree of relationship:
關係相隔一代的：
my first cousin once removed.
我堂親的孩子
n.（名詞）
A single occurrence; one time:
發生一次；一次：
Once will have to do. You can go just this once.
必須去做一次，你只去這一回
conj.（連接詞）
As soon as; if ever; when:
一…就；一旦；當…時：
Once he goes, we can clean up.
他一走，我們就能清理
adj.（形容詞）
Having been formerly; former:
曾經的；以前的：
the once capital of the nation.
該國以前的首都
習慣用語
at once
(1)All at one time; simultaneously:
立刻；同時：
Everything happened at once. The view of the skyline is at once awesome, grand, and disappointing.
所有的事都一起發生了。天邊立刻呈現出令人敬畏的、壯麗的和令人沮喪的景色
(2)Immediately; instantly:
立即；馬上：
Leave the room at once.
馬上離開這個房間
語源
(1)Middle English ones
中古英語 ones
(2)from on [one]
源自 on [一]
(3)from Old English 3n * see oi-no-
源自 古英語 3n *參見 oi-no-
現代英漢詞典
once
[wQns]
adv.
(1)一次，一回
I go to see a film once a week.
我每週看一場電影。
"Once a month, he has to collect money from his customers."
"每月一次,他得去向顧客收錢。"
Once a year a race is held for old cars.
每年舉行一次舊式小汽車比賽。
"Attention please, I'll repeat the question once more."
請注意我把問題再重複一遍。
(2)從前； 曾經
She once knew him.
她以前認識他。
"Once, however, Big Ben failed to give the correct time."
"不過,有一次`大本鍾'報錯了時間。"
A good editor never once leaves a misprint uncorrected.
一個好編輯決不會放過一個印刷錯誤。
It once seemed inconceivable to everyone that men should travel to the moon.
"人們一度認為,人飛上月球似乎是不可想像的。"
習慣用語
all at once
突然, 忽然
at once
馬上，立刻；同時
Do it at once.
馬上做。
Don't all speak at once!
大家別一塊兒說話！
once (and) for all
最後一次
"Once and for all, we can't agree!"
"最後再說一遍,我們不能同意!"
once or twice
幾次；一兩次
once upon a time
從前
Once upon a time there was a poor old fisherman.
從前有一位貧窮的老漁夫。
詞性變化
once
conj.
一旦；一…就…
Once printed, this dictionary will be very popular!
一旦出版，這本詞典將會非常暢銷！
Once he arrives we can start.
他一到我們就可以動身。
once
n.
一次
Do it just this once.
只做這一次。
For once he was telling the truth.
他只有這一次說了實話。
"If one once loses self-confidence, he can never expect to be successful."
"一個人一旦失去了自信心,就甭想獲得成功。"
Will once be enough?
一次就夠了嗎?
現代英漢綜合大辭典
once
[wQns]
adv.
(1)一次
(2)曾經; 從前
(3)一旦; 一度
(4)[用於否定句]一次也(不); 完全(不)
(5)乘以一; (親屬間行輩上)小一輩; (程度上)相差無幾
once a year
一年一次
a once powerful nation
曾很強盛的國家
a cousin once removed
堂[表]兄弟[姊妹]的孩子
If the facts once become known, he will be punished.
事實一旦公開, 他就要受到懲罰。
I couldn't once understand what he meant.
我完全不懂他的意思。
Once one is one.
一一得一。
詞性變化
once
conj.
一旦, 每當
Once you begin you must continue.
你一旦開始, 便不可停下來。
n.
一次, 一回
Once is enough for me.
對我來說一次就夠了。
adj.
從前的
a once friend
從前的一個朋友
繼承用法
once-forbidden
adj.
一次禁戒的
once-through
n.
強制循環
習慣用語
all at once
突然; 同時
at once
立刻, 馬上; 同時
every once in a while
[美]偶而
for this once (=for once, just for once)
就這一次; 破例一回
if once (=when once)
一旦
more than once
不止一次, 多次
not once
一次也不
once again
再一次
once and again
一再, 再三
once and away
一勞永逸; 限此一次; 斷然, 爽快
once for all
一勞永逸; 永久地; 徹底地
once in a while
有時, 間或, 偶而
once more
再一次
once again
再一次
once or twice
一兩次; 有時, 偶爾
once over lightly
從頭到尾馬馬虎虎地
once too often
又(多了)一次
美國傳統詞典
once
once
AHD:[w?ns]
D.J.[w(ns]
K.K.[w(ns]
adv.
(1)One time only:
once a day.
(2)At one time in the past; formerly.
(3)At any time; ever:
Once known, his face is never forgotten.
(4)By one degree of relationship:
my first cousin once removed.
n.
A single occurrence; one time:
Once will have to do. You can go just this once.
conj.
As soon as; if ever; when:
Once he goes, we can clean up.
adj.
Having been formerly; former:
the once capital of the nation.
習慣用語
at once
(1)All at one time; simultaneously:
Everything happened at once. The view of the skyline is at once awesome, grand, and disappointing.
(2)Immediately; instantly:
Leave the room at once.
語源
(1)Middle English ones
(2)from on [one]
(3)from Old English 3n * see oi-no-
英漢航海大詞典
at once
prep.立刻,馬上
英漢化學大詞典
at once
adv.立即,立刻,同時
英漢經貿大詞典
at once
adv.立即