n.[C]
1. 专家;能手;熟练者[(+at/in/on)]
She is an expert in training animals.
她是驯兽专家。
2. 【军】特等射手
a.
1. 熟练的,老练的;有经验的[(+at/in/on)]
He became an expert language teacher.
他成了一个有经验的语言教师。
2. 专家的,内行的;专门的[B]
Expert opinions are favorable to the project.
专家的意见是赞成这一工程的。