at home with something

• 熟悉；精通

at home with something的用法和样例：

例句

1. I needed some orientation at this stage.
   我在这个阶段需要熟悉情况。
2. I am not familiar with chemical terms.
   我不熟悉化学术语。
3. 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。
4. He has Sanskrit at the tips of his fingers.
   他精通梵文。