expert
🇺🇸
/ˈekspɜːrt/
🇬🇧
/ˈekspɜːt/
a person who knows a lot about something
The expert helped us understand the problem.
这位专家帮助我们理解了问题。
done with great skill or knowledge
She gave expert advice on the matter.
她在这个问题上给出了专业的建议。