have an ace up one's sleeve
collocation有锦囊妙计；留有王牌
He always has an ace up his sleeve when negotiating.
谈判时他总是有锦囊妙计。
A牌；A
aces — plural of ace
先理解核心含义，再看它在真实句子里的用法。
A牌；A
A playing card with a single pip, typically the highest or lowest card in a game.
In the dice game, rolling an ace gives you the highest score.
在骰子游戏中，掷出幺点能得到最高分。
显示单个点数的扑克牌,通常是游戏中最高或最低的牌
A playing card showing a single pip, typically the highest or lowest ranking card in a game.
美国电影剪辑师协会成员。
A member of American Cinema Editors
一；最小整数
the smallest whole number or a numeral representing this number
标有一个点的骰子面,通常代表数字一
A die face marked with a single dot, typically representing the number one.
She won the card game by playing the ace of spades.
她打出黑桃A赢得了这场纸牌游戏。
He is an ace at programming, able to fix any bug quickly.
他是编程高手，能快速修复任何漏洞。
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有锦囊妙计；留有王牌
He always has an ace up his sleeve when negotiating.
谈判时他总是有锦囊妙计。
差一点就；几乎
She came within an ace of winning the championship.
她差一点就赢得了冠军。
王牌；秘密优势
The team kept their star player as an ace in the hole.
球队将他们的明星球员保留作为秘密武器。
王牌投手
The Yankees' ace pitcher struck out ten batters.
洋基队的王牌投手三振了十名击球手。
优等生
She is an ace student in mathematics.
她是数学方面的优等生。
黑桃A
He drew the ace of spades and won the game.
他抽到了黑桃A并赢了比赛。
隐藏的杀手锏；秘密王牌
He had an ace in the hole, which made him confident.
他有一张隐藏的王牌，这让他很自信。
差一点就……
She came within an ace of winning the race.
她差一点就赢了那场比赛。
秘密的计策；锦囊妙计
I have an ace up my sleeve for the negotiation.
我有一条锦囊妙计用于谈判。
王牌，秘密武器
He still had an ace in the hole that no one knew about.
他还有一张没人知道的王牌。
黑桃A（也指莫特黑德乐队的歌曲）
The Ace of Spades is considered the highest card in many games.
黑桃A在许多游戏中被视为最大的牌。
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发音似‘艾斯’，纸牌中的A代表第一，引申为一流高手。
[object Object]
All listed words rhyme with ace, as they share the /eɪs/ ending sound.
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.