be master in one's own house

例句：

1. 1.She is a master of the violin.
   她擅长小提琴。
2. 2.The master chef taught us how to cook this dish.
   这位主厨教我们如何烹饪这道菜。
3. 3. He is the master of his craft.
   他是他的领域的专家。