n.[C]

1. 專家；能手；熟練者[（+at/in/on）]
   She is an expert in training animals.

   她是馴獸專家。

2. 【軍】特等射手

a.

1. 熟練的，老練的；有經驗的[（+at/in/on）]
   He became an expert language teacher.

   他成了一個有經驗的語言教師。

2. 專家的，內行的；專門的[B]
   Expert opinions are favorable to the project.

   專家的意見是贊成這一工程的。

n.

adj.