expertise

/ˌɛkspərˈtiz/

skillfulness by virtue of possessing special knowledge

中文释义：专业知识；专长；技能

The consultant's expertise in marketing helped the company boost sales.

顾问在市场营销方面的专业知识帮助公司提升了销售额。

We need someone with technical expertise to solve this problem.

我们需要有技术专长的人来解决这个问题。