at home on

• adj. 精通(熟悉)

at home on的用法和样例：

例句

用作形容词 (adj.)

1. He's quite clued-up on American literature.
   他对美国文学很精通。
2. The Canadian-Japanese is at home in both languages.
   那个加拿大籍日本人两种语言都精通。