对多年的合作表示感谢的翻译：Expressed his gratitude for so many years of collaboration 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Grateful for the many years of cooperation

Expressed his gratitude for so many years of collaboration

Expresses thanks to many year cooperations

Expresses its gratitude to the many years of cooperation

Expressed his gratitude for so many years of collaboration