Dan在商业分布式计算技术的研究方面有20多年的经验，涉及的领域包括面向事务和对象的系统、编程语言、消息传递和数据库系统。

Dan has over 20 years of experience in research and commercial distributed computing ranging over transaction and object-oriented systems, programming languages, messaging, and database systems.

youdao

Dan在商业分布式计算技术的研究方面有20多年的经验，涉及的领域包括面向事务和对象的系统、编程语言、消息传递和数据库系统。

Dan has over 20 years of experience in research and commercial distributed computing ranging over transaction and object-oriented systems, programming languages, messaging, and database systems.

youdao