Masteries
n. 精通, 熟练（mastery的复数形式）
🗣️ 情景例句
I really appreciate all of your hospitality.
十分感谢您的款待。
Who is the governor of this state?
谁是这州的州长？
But of course, he can learn by himself. He has a book and a dictionary.
但当然，他也可以自学。他有书和词典。