- 《be ~》長年この仕事{しごと}に従事{じゅうじ}している
- in the business many years: 《be ~》長年この仕事{しごと}に従事{じゅうじ}している
- client with whom we have had business relations for many years: 当社の永年の取引先
- continue one's business and personal relationship with someone for many years to come: 今後{こんご}も末永く公私共{すえながく こうし とも}に(人)と付き合いを続ける