We have professional research and development department and strict quality control system.

我们有专业的研究和开发部门和严格的质量控制体系。

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We have professional after-sales service of machines, installation and technical personnel.

我们有专业的机器销售后的服务、安装调试技术人员。

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But first,we talk to some Americans who have retired from their professional lives but still work hard to help others.

VOA: special.2010.07.16

You have--if we have a professional police, then where do the people go that they arrest?

NPR: Iraqi Police Struggle with Rule of Law

"We have a professional standards unit that conducted an inquiry right after this event, " he said.

NPR: Sergeant Who Arrested Gates Tells His Story

There are probably more fungi than there are other organisms put together and yet in Wales we have one professional mycologist.

BBC: Lichen in Wales could hold key to antibiotics resistance