expertise /ˌekspɜːˈtiːz/ n. 专门知识；专门技能；专长:

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例句/词组:

They have considerable expertise in dealing with oil spills. 他们在解决溢油问题方面非常在行。

英语解释：

~ (in sth / in doing sth) expert knowledge or skill in a particular subject, activity or job• 专门知识；专门技能；专长: