top dog

英 [ˌtɒp ˈdɒɡ]

美 [ˌtɑːp ˈdɔːɡ]

n. (尤指竞争中的)夺魁者，优胜者

牛津词典

noun

（尤指竞争中的）夺魁者，优胜者
a person, group or country that is better than all the others, especially in a situation that involves competition

N-COUNT 首领;老大;魁首
If a person or organization istop dog, they are the most successful or powerful one in a particular group.
1. Reynolds has never concealed his ambition to be the top dog.
  雷诺兹从没掩饰过他要成为老大的雄心。

noun

A new top dog emerged in New York's Coney Island and there is the world's Hot Dog Eating Champion.
美国的C岛屿里出现了一个新的胜利者。那里有一个世界性的吃热狗比赛。
But they are not top dog here.
但它们不是这里顶级的狗。
Imagine a scenario where China became the top dog, he says.
他说，设想一下中国成为全球霸主的那一天。
Should Kobe be top dog?
科比应该是最好的吗？
So there we have it, eight good and sound reasons why Britain is and has always been top dog.
好啦，这些就是为什么英国现在是而且一直是魁首的8个无可争辩的理由。
So the breeder gave him to Jeremy Dingle, who soon realised that he had a special pup, now a top dog in the dachshund-racing [ 1] world.
JeremyDingle很快就发现，他得到了一只特别的小狗，现在是达克斯狗赛[1]界的佼佼者。
I think we'd be top dog if the defense would step up.
若防守称职我们早已是联盟老大。
Google is still the undisputed top dog in search, and has been for years.
谷歌多年来一直占据着搜索领域的霸主地位，至今无人撼动。
Be careful what you say to him because he's top dog in the office.
和他说话你要谨慎，因为他是这办公室里左右局面的人。
With the US economy punctured by Wall Street, China is widely perceived to be the global top dog designate.
由于华尔街已经挫伤了美国经济，因此中国被广泛视为未来的全球第一。