top dog
noun/ˌtɒp ˈdɒɡ/
/ˌtɑːp ˈdɔːɡ/
[usually singular] (informal)- a person, group or country that is better than all the others, especially in a situation that involves competition
（尤指竞争中的）夺魁者，优胜者 - The team wanted to prove that they were top dogs in the region.
该队想证明他们是区内最好的。
- The team wanted to prove that they were top dogs in the region.