Question

ace
ace  AHD[³s]   DJ[e!s]  KK[es]
n.（名词）
1.Games
  【游戏】
2.A single spot or pip on a playing card, die, or domino.
    一点，幺点：纸牌、骰子或骨牌中的幺点或一点
3.A playing card, die, or domino having one spot or pip.
    幺点纸牌，幺点骰子，幺点骨牌：带有一点或幺点的纸牌、骰子或骨牌
4.Sports In racket games:
  【体育运动】 在板球运动中
5.A serve that one's opponent fails to return.
    得分的发球：发球后对方未能击回
6.A point scored by such a serve.
    发球得分
7.Sports The act of hitting a golf ball in the hole with one's first shot.
  【体育运动】 一杆进洞，一杆得分：一杆将高尔夫球击入洞中的行为
8.A military aircraft pilot who has destroyed five or more enemy aircraft.
    王牌驾驶员：空军中击落五架或五架以上敌机的飞行员
9.An expert in a given field.
    佼佼者，优异者：某一领域的专家
adj.（形容词）
    Topnotch; first-rate.
    杰出的；第一流的
v.tr.（及物动词）  aced,ac.ing,ac.es
1.Sports To serve an ace against.
  【体育运动】 发球得分
2.Sports To hit an ace in golf.
  【体育运动】 一杆进洞：在高尔夫球赛中一杆进洞
3.Slang To get the better of (someone):
  【俚语】 占据优势：
    a candidate who aced his opponents in the primaries.
    在预选中领先其对手的候选人
4.Slang To receive a grade of A on:
  【俚语】 成绩为A：
    She aced the exam.
    她在考试中得了A
IDIOMS
▪ace in the hole: A hidden advantage or resource kept in reserve until needed.
    锦囊妙计：隐藏的优势或资源，一直保存到需要时
▪within an ace of: On the verge of; very near to:
    差一点，几乎；非常接近：
    came within an ace of losing the election.
    几乎失去竞选
ORIGIN
1.Middle Englishas
    中古英语as
2.from Old French
    源自 古法语
3.from Latin [unit]
    源自 拉丁语 [单位]