expertise

n. /ˌekspɜːrˈtiːz/ B1

专业知识；专长

Expert knowledge or skill in a particular subject, activity, or job.

仙境例句

Having no expertise with giants, the Rabbit asked everyone in the yard what to do.

白兔对付巨人毫无经验，只好挨个问院子里的大家该怎么办。