ace
noun [ C ] uk/eɪs/ us/eɪs/
(PLAYING CARD)
幺点的纸牌，A 纸牌
one of the four playing cards with a single mark or spot. The ace has the highest or lowest value in many card games.
the ace of hearts/clubs/spades/diamonds 红桃／梅花／黑桃／方块 A
(SKILLED PERSON)
informal擅长…的人，精通…的人;能手
a person who is very skilled at something
a tennis/flying ace 网球高手／王牌飞行员
(TENNIS)
（网球）发球得分
in tennis, a serve (= a hit of the ball that starts play) that is so strong and fast that the other player cannot return the ball
That's the third ace Lawson has served this match. 那是罗森在这场比赛中第三次发球得分。
Idioms
an ace up your sleeveidiom (US also an ace in the hole) 秘密王牌；锦囊妙计
secret knowledge or a secret skill that will give you an advantage
come within an ace of somethingidiom UK 差一点，几乎
to almost achieve something
She came within an ace of winning the match. 她差一点就赢了这场比赛。
have/hold all the acesidiom 占绝对优势
to be in a strong position when you are competing with someone else because you have all the advantages
In a situation like this, it's the big companies who hold all the aces. 在这种形势下，占尽优势的是那些大公司。
ace
verb [ T ] US informal uk/eɪs/ us/eɪs/
…考得很好
to do very well in an exam
I was up all night studying, but it was worth it - I aced my chemistry final. 我熬了个通宵学习，倒是没有白费劲，化学期终考试我考得很好。
ace
adjective uk/eɪs/ us/eɪs/
(VERY GOOD)
old-fashioned slang第一流的，极好的
excellent
He's an ace basketball player. 他是一流的篮球运动员。
That's an ace bike you've got there. 你那辆自行车棒极了。
Synonyms: crack first-ratesuper top-notch