the big boys
noun [ plural ] informal uk/ˈbɪɡ ˌbɔɪz/ us/ˈbɪɡ ˌbɔɪz/
大人物，大亨；大企业，大公司
the most important people in an activity or organization, or the most powerful businesses with the most influence in a particular area
I'm just a small business owner - I don't have the capital to compete with the big boys. 我们只是个小公司，没有资本去同那些大公司竞争。