a junior partner的用法和样例：
- I was a junior partner in a bank in Lombard Street, and had four more days of holiday left.
- The ambitions of these two men, one the ruler of his country, the other a junior partner in a team of English soldier-adventurers, soon intersected.
- He is studying at a junior middle school.
- He is the junior partner in the firm.
- He joined the firm as a junior clerk, and finished up a director.