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

With his great talents, the new boy soon became the top dog and whatever he said was law to all the other boys.
凭着自己的聪明才智，这个新来的男孩不久就称王了，他说什么，别的男孩都听他的。
Thought still a young man, he is already top dog in his firm.
尽管年轻，他已在公司掌权了。
Chris: Well, I'm the boss! I'm the top dog around here!
克里斯：这样啊，我是老板！是这里的老大！
But they are not top dog here.
但它们不是这里顶级的狗。
Most puppies seem to be duking it out right now over who will be top dog.
的途径。此时，大多数幼犬似乎正在以武力的形式来确定谁是头狗。
Labrador Retriever top dog in U.S.for19th year.
拉布拉多犬连续第19年当选美国最受欢迎犬种。
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。
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。
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。