at home in的用法和樣例：
例句
- The dance girl is quite at home in front of strangers.
那個跳舞女郎在生人面前沒一點緊張。 - I'm always at home in the evenings.
晚上我總是在家裡。 - At home in sth.
精通; 擅長 - Is it difficult to feel at home in (ie confident when using) a foreign language?
精通一門外語難不難? - The Canadian-Japanese is at home in both languages.
那個加拿大籍日本人兩種語言都精通。
