a bosom friend的用法和样例：
- The girl was fortunate enough to have her mother as a bosom friend.
- I didn't know you were a bosom friend of Perrys'.
- Jing Ke had a bosom friend in the State.
- Having a bosom friend several drunks with no tea.
- A bosom friend afar brings a distant land near.
- Jeff: Good, I came across a bosom friend.